In Project windows, where your files & groups are being displayed:
Issue #1 Scrolling doesn't work if you have a selected an item in the tree view.
Issue #2 Scrolling is not smooth in the tree view of the Project window.
If any one has any quick hack to solve this issues much appreciated,
We are on windows 10.
uVision 5.28
Are you on the same PC running uVision, or using some kind of remote access? I have uVision 5.28 on Windows 10, and have never seen this behavior.