2017 iMac Retina 5K 27", running Big Sur 11.5.2, InDesign 2021.

Suddenly, without warning or explanation certain keyboard shortcuts have stopped working.

The T shortcut to change to type tool flicks to type tool and then back to original tool (eg Selection tool).

Hand tool on space bar does not work and zoom on space bar + cmd does not work.

For some time now, you can't hide ID when there are no documents open by using cmd–H.

I have been using ID since almost the very beginning and these have always worked. As I'm paying a monthly sub for this very expensive but necessary software you need to get it right every time before release. These are shortcuts that I use as second nature but are now for some reason faulty.

This isn't really an idea, it's a complaint.