Combination buttons cannot be used for fire rocket salvo

My fire rocket salvo button is the mouse side button + left button.
Since the version update, This combination button has become very strange.
If I press the side button first and then the left button, Nothing happened.
If I press the left button first and then the side button, My gun and fire rocket salvo will both work.

Same. Even stranger, I switched buttons for chat switch, but new combination doesn’t work, but if I use TAB for switching it works well even if setting was changed.