I have recently upgraded to DS2019-SP0. One of the issues I have is that:
a) on busy drawings, 80% of the times I attempt to select an entity with a mouse left-click, an autosave immediately occurs and the item is immediately unselected.
b) This happens even if AutoSave is disabled.
c) This even happens if I isolate a single layer to work on.
d) However, I can reliably select items with a crossing window.

On the plus side, I haven't lost any unsaved work lately ;)