Example: in C++, writing switch(..) on an enum would automatically default create all switch cases. Then later versions, it only occasionally did it, now it doesn't do it at all.
Another example: When my application finishes and VS is activated, sometimes the cursor is in one window, but typing happens in another.
Another example: In Windows 11, when resizing a window, the artifacts seem to have gotton worse. Sometimes even the whole window is flickering.