diff --git a/python/cuxfilter/charts/core/aggregate/core_aggregate.py b/python/cuxfilter/charts/core/aggregate/core_aggregate.py
index e9f9676b..afe97acc 100644
--- a/python/cuxfilter/charts/core/aggregate/core_aggregate.py
+++ b/python/cuxfilter/charts/core/aggregate/core_aggregate.py
@@ -25,6 +25,7 @@ class BaseAggregateChart(BaseChart):
     datatile_active_color = DATATILE_ACTIVE_COLOR
     stride = None
     data_points = None
+    _x_dtype = float
 
     @property
     def datatile_loaded_state(self):
@@ -48,10 +49,32 @@ def datatile_loaded_state(self, state: bool):
             else:
                 self.filter_widget.bar_color = DATATILE_INACTIVE_COLOR
 
+    @property
+    def x_dtype(self):
+        """
+        override core_chart x_dtype and make it constant, as panel 0.11 seems
+        to update the datetime x_axis type to float during runtime
+        """
+        return self._x_dtype
+
+    @x_dtype.setter
+    def x_dtype(self, value):
+        self._x_dtype = value
+
     @property
     def custom_binning(self):
         return self._stride is not None or self._data_points is not None
 
+    def _transformed_source_data(self, property):
+        """
+        this fixes a bug introduced with panel 0.11, where bokeh CDS
+        x-axis datetime is converted to float, and the only way to
+        convert it back to datetime is using datetime64[ms]
+        """
+        if self.x_dtype in CUDF_DATETIME_TYPES:
+            return self.source.data[property].astype("datetime64[ms]")
+        return self.source.data[property]
+
     def __init__(
         self,
         x,
@@ -110,15 +133,14 @@ def __init__(
         self.y_axis_tick_formatter = y_axis_tick_formatter
         self.library_specific_params = library_specific_params
 
-    def _compute_array_all_bins(
-        self, source_x, source_y, update_data_x, update_data_y
-    ):
+    def _compute_array_all_bins(self, source_x, update_data_x, update_data_y):
         """
         source_x: current_source_x, np.array()
-        source_y: current_source_y, np.array()
         update_data_x: updated_data_x, np.array()
         update_data_y: updated_data_x, np.array()
         """
+        if self.x_dtype in CUDF_DATETIME_TYPES:
+            source_x = source_x.astype("datetime64[ms]")
         result_array = np.zeros(shape=source_x.shape)
         indices = [np.where(x_ == source_x)[0][0] for x_ in update_data_x]
         np.put(result_array, indices, update_data_y)
@@ -154,7 +176,7 @@ def initiate_chart(self, dashboard_cls):
         Ouput:
 
         """
-        self.source = dashboard_cls._cuxfilter_df.data
+        self.x_dtype = dashboard_cls._cuxfilter_df.data[self.x].dtype
         # reset data_point to input _data_points
         self.data_points = self._data_points
         # reset stride to input _stride
@@ -248,19 +270,18 @@ def calculate_source(self, data, patch_update=False):
         }
 
         if patch_update and len(dict_temp["X"]) < len(
-            self.source.data[self.data_x_axis]
+            self._transformed_source_data(self.data_x_axis)
         ):
             # if not all X axis bins are provided, filling bins not updated
             # with zeros
             y_axis_data = self._compute_array_all_bins(
-                self.source.data[self.data_x_axis],
-                self.source.data[self.data_y_axis],
+                self._transformed_source_data(self.data_x_axis),
                 dict_temp["X"],
                 dict_temp["Y"],
             )
 
             dict_temp = {
-                "X": self.source.data[self.data_x_axis],
+                "X": self._transformed_source_data(self.data_x_axis),
                 "Y": y_axis_data,
             }
 
@@ -393,10 +414,13 @@ def query_chart_by_range(self, active_chart, query_tuple, datatile):
             round((max_val - active_chart.min_value) / active_chart.stride)
         )
         if self.custom_binning:
-            datatile_indices = self.source.data[self.data_x_axis]
+            datatile_indices = self._transformed_source_data(self.data_x_axis)
         else:
             datatile_indices = (
-                (self.source.data[self.data_x_axis] - self.min_value)
+                (
+                    self._transformed_source_data(self.data_x_axis)
+                    - self.min_value
+                )
                 / self.stride
             ).astype(int)
 
@@ -473,10 +497,13 @@ def query_chart_by_indices_for_mean(
         Ouput:
         """
         if self.custom_binning:
-            datatile_indices = self.source.data[self.data_x_axis]
+            datatile_indices = self._transformed_source_data(self.data_x_axis)
         else:
             datatile_indices = (
-                (self.source.data[self.data_x_axis] - self.min_value)
+                (
+                    self._transformed_source_data(self.data_x_axis)
+                    - self.min_value
+                )
                 / self.stride
             ).astype(int)
         if len(new_indices) == 0 or new_indices == [""]:
@@ -525,10 +552,13 @@ def query_chart_by_indices_for_count(
         Ouput:
         """
         if self.custom_binning:
-            datatile_indices = self.source.data[self.data_x_axis]
+            datatile_indices = self._transformed_source_data(self.data_x_axis)
         else:
             datatile_indices = (
-                (self.source.data[self.data_x_axis] - self.min_value)
+                (
+                    self._transformed_source_data(self.data_x_axis)
+                    - self.min_value
+                )
                 / self.stride
             ).astype(int)
         if len(new_indices) == 0 or new_indices == [""]:
@@ -577,10 +607,13 @@ def query_chart_by_indices_for_minmax(
         Ouput:
         """
         if self.custom_binning:
-            datatile_indices = self.source.data[self.data_x_axis]
+            datatile_indices = self._transformed_source_data(self.data_x_axis)
         else:
             datatile_indices = (
-                (self.source.data[self.data_x_axis] - self.min_value)
+                (
+                    self._transformed_source_data(self.data_x_axis)
+                    - self.min_value
+                )
                 / self.stride
             ).astype(int)
 
diff --git a/python/cuxfilter/charts/core/core_widget.py b/python/cuxfilter/charts/core/core_widget.py
index 5bd52056..4f228e47 100644
--- a/python/cuxfilter/charts/core/core_widget.py
+++ b/python/cuxfilter/charts/core/core_widget.py
@@ -43,6 +43,11 @@ def stride(self, value):
             self.stride_type = type(value)
         self._stride = value
 
+    @property
+    def x_dtype(self):
+        # default x_dtype
+        return float
+
     def _xaxis_np_dt64_transform(self, dates):
         """
         Description: convert to datetime64 if self.x_dtype is of type datetime
diff --git a/python/cuxfilter/dashboard.py b/python/cuxfilter/dashboard.py
index fd000986..57a95b9c 100644
--- a/python/cuxfilter/dashboard.py
+++ b/python/cuxfilter/dashboard.py
@@ -688,8 +688,6 @@ def _calc_data_tiles(self, cumsum=True):
         """
         Calculate data tiles for all aggregate type charts.
         """
-        # query_str = self._generate_query_str(self._active_view)
-
         # NO DATATILES for scatter types, as they are essentially all
         # points in the dataset
         query = self._generate_query_str(ignore_chart=self._active_view)
diff --git a/python/cuxfilter/layouts/custom_react_template.py b/python/cuxfilter/layouts/custom_react_template.py
index 57d1c87c..3c32c1f1 100644
--- a/python/cuxfilter/layouts/custom_react_template.py
+++ b/python/cuxfilter/layouts/custom_react_template.py
@@ -66,6 +66,10 @@ class ReactTemplate(BasicTemplate):
     }
 
     def _template_resources(self):
+        # resolves bug in panel where theme is expected to have base_css even
+        # when css property is present
+        self.theme.base_css = self.theme.css
+
         resources = super()._template_resources()
         # CSS files
         base_css = os.path.basename(self._css)
diff --git a/python/cuxfilter/themes/assets/rapids.css b/python/cuxfilter/themes/assets/rapids.css
index fa4af68c..b3a36005 100644
--- a/python/cuxfilter/themes/assets/rapids.css
+++ b/python/cuxfilter/themes/assets/rapids.css
@@ -1,50 +1,50 @@
 body {
-    color: white;
-    background-color: #121212;
-  }
-  
-  #header {
-    background-color: #8735fb;
-  }
-  
-  .panel-df tbody tr:nth-child(odd){
-    background-color: #000 !important;
-  }
-  
-  .drag-handle, .react-resizable-handle {
-    filter: brightness(0) invert(1);
-  }
-  
-  #main {
-    color: white;
-    background-color: #121212;
-  }
-  
-  #sidebar {
-    color: white;
-    border-color: #292929 !important;
-    background-color: #121212 !important;
-  }
-  
-  .bk.card {
-    color: white;
-    background-color: #2f2f2f;
-  }
-  
-  .bk-root .bk-input{
-    color: white;
-    background-color: #2f2f2f;
-  }
-  
-  #header-items {
-    color: white;
-  }
-  
-  .bk.card-header {
-    color: white;
-    background-color: #292929 !important;
-  }
-  
-  .indicator > div > div {
-    color: white !important;
-  }
+  color: white;
+  background-color: #121212;
+}
+
+#header {
+  background-color: #8735fb;
+}
+
+.panel-df tbody tr:nth-child(odd){
+  background-color: #000 !important;
+}
+
+.drag-handle, .react-resizable-handle {
+  filter: brightness(0) invert(1);
+}
+
+#main {
+  color: white;
+  background-color: #121212;
+}
+
+#sidebar {
+  color: white;
+  border-color: #292929 !important;
+  background-color: #121212 !important;
+}
+
+.bk.card {
+  color: white;
+  background-color: #2f2f2f;
+}
+
+.bk-root .bk-input{
+  color: white;
+  background-color: #2f2f2f;
+}
+
+#header-items {
+  color: white;
+}
+
+.bk.card-header {
+  color: white;
+  background-color: #292929 !important;
+}
+
+.indicator > div > div {
+  color: white !important;
+}
diff --git a/python/cuxfilter/themes/rapids.py b/python/cuxfilter/themes/rapids.py
index 5f173b96..6b892411 100644
--- a/python/cuxfilter/themes/rapids.py
+++ b/python/cuxfilter/themes/rapids.py
@@ -7,7 +7,7 @@
 
 
 class RapidsTheme(Theme):
-    DARK = {
+    RAPIDS = {
         "attrs": {
             "Figure": {
                 "background_fill_color": "#2f2f2f",
@@ -71,7 +71,7 @@ class RapidsTheme(Theme):
         }
     }
 
-    bokeh_theme = _BkTheme(json=DARK)
+    bokeh_theme = _BkTheme(json=RAPIDS)
     map_style = "mapbox://styles/mapbox/dark-v9"
     map_style_without_token = (
         "https://basemaps.cartocdn.com/gl/dark-matter-gl-style/style.json"