-I applied Motion Blur to picture.
-And then I try to undo that but Krita is telling me that it's waiting for image operation to complete-
-But I can't see any operation in Layer or Status bar
-I can't do anything
-I had to kill it by Task Manager
-Thanks you very much My Autosave every 3mins

In old Krita whatever you do you can see operation progress bar in Bottom status bar.
I can also cancel by clicking red cross in Krita. Brush stroke or Filter.
I like that function