diff --git a/src/megatron/bridge/models/gpt_oss/gpt_oss_provider.py b/src/megatron/bridge/models/gpt_oss/gpt_oss_provider.py
index 0574ce7b57..ca0e0f2525 100644
--- a/src/megatron/bridge/models/gpt_oss/gpt_oss_provider.py
+++ b/src/megatron/bridge/models/gpt_oss/gpt_oss_provider.py
@@ -63,8 +63,8 @@ class GPTOSSProvider(GPTModelProvider):
     yarn_beta_fast: float = 32.0
     yarn_beta_slow: float = 1.0
     yarn_correction_range_round_to_int: bool = False
-    yarn_mscale: Optional[float] = None
-    yarn_mscale_all_dim: Optional[float] = None
+    yarn_mscale: Optional[float] = 1.0 # NOTE (yiakwy) : None
+    yarn_mscale_all_dim: Optional[float] = 1.0 # NOTE(yiakwy) : None
 
     moe_router_topk: int = 4
     moe_router_pre_softmax: bool = False
diff --git a/src/megatron/bridge/training/config.py b/src/megatron/bridge/training/config.py
index 70420c8aa1..b5e84884ac 100644
--- a/src/megatron/bridge/training/config.py
+++ b/src/megatron/bridge/training/config.py
@@ -153,7 +153,7 @@ class DistributedInitConfig:
     Make sure EP and CP aren't used with this option enabled.
     """
 
-    use_gloo_process_groups: bool = True
+    use_gloo_process_groups: bool = False # True NOTE (yiakwy)
     """If set, create Gloo process groups for communications."""
 
     use_sharp: bool = False