I don’t know if this is a known bug or not
I you change keybindings UI doesn’t update 
I think that works different from your keybindings. An example is the menu from esc it has a save and quit button but it doesn’t change if you change the save and quit hot key to 7 the menu still uses S rather than your set 7. I think it’s hard coded for that but if you want to make it use your set keybindings you could MOD the game. Hope this helps you.