[chocobo]

Sorry I should have stated that there are bunch of other Ctrl + whatever key combos that are not working, like Ctrl + N, Ctrl + O, Ctrl + =, Ctrl + W, Ctrl + I etc.

Shift key does work as intended in the ways you've suggested.

In addition to Ctrl + Shift not working, Ctrl + Alt also doesn't work, e.g. Ctrl + Alt + F.

Ctrl + Alt + P was registered as Alt + P (Event Operations Window)

and Shift + Alt keys work, e.g. Alt + Shift + D (Duplicate Tracks)

"A" key works on its own (Trimming the head of the region) and works when pressed with Ctrl (Select All), also the number keys worked on their own (different zoom levels) and work with Ctrl (cycle between tools), so it's just strange for it to not be registered with other keys.

I tried using any combinations of the Left and Right modifier keys too, and they act the same way.