Some keys not working when using lightroom

Hi - New to BetterTouchTool - I've just set up some keyboard shortcuts for my workflow in LR Classic (latest version). When I export and need to use the keyboard to type file names, the keys I have assigned don't work. Forgive my ignorance; is this normal and should I prefix my short cut keys with command etc?

iMac 2020 i7 - Big Sur-latest version.

Thanks - Neil