Fix dragging on content placed above the trackedView resets scroll position (#527)

Changed how `initialScrollOffset` is set. This issue was described in #526.

Author: dudek-j

Sources/Core.swift

@@ -710,7 +710,7 @@ class Core: NSObject, UIGestureRecognizerDelegate {
         if stopScrollDeceleration {
             DispatchQueue.main.async { [weak self] in
                 guard let self = self else { return }
-
+                
                 self.stopScrolling(at: self.initialScrollOffset)
             }
         }
@@ -801,7 +801,7 @@ class Core: NSObject, UIGestureRecognizerDelegate {
             if grabberAreaFrame.contains(location) {
                 initialScrollOffset = scrollView.contentOffset
             } else {
-                initialScrollOffset = contentOffsetForPinning(of: scrollView)
+                initialScrollOffset = scrollView.contentOffset
                 let offsetDiff = scrollView.contentOffset - contentOffsetForPinning(of: scrollView)
                 switch layoutAdapter.position {
                 case .top, .left: