1.21.4 - Activator keys being ignored

[Gamemassa]

I'm noticing many cases where activator keys are being completely ignored. Here are some of them:

• with Xaero's Minimap/World Map, I set "Show/Hide Minimap" to "M" and "Show/Hide World Map" to "Alt+M" but when I press M both keybinds are activated regardless of whether I'm holding Alt. Same thing with JourneyMap except only the fullscreen map opens and closes.
• When I set "Move Backward" to "B" and "Move Forward" to "Alt+B" (just as a test) I noticed that when I press B I move backwards, but when I press Alt+B I stand still.
• When I set "Toggle Fullscreen" to "Alt+L", with L also being the default key to bring up the advancement screen, L instead only switches me from Fullscreen to Windowed and no longer brings up the advancement screen.

I'll tinker a bit and see what other examples I can find.