For some reason I don't have access to the same shortcuts on all boards.

What's even more baffling to me is that the shortcut menu actually changes from one board to the next, so it seems this is intentional, but I'm having a hard time imagining a rationale that would explain inconsistent behaviour as good UX...
I use the "R" shortcut more than any other, but (suddenly) can't access it in one of my primary boards. Anyone know what's up with this?
I'm using the MacOS app 2.11.7.