Musescore 4 - I can't input the note A with my A key on the keyboard.

I was deeply impressed by the new design of MuseScore4. Everything looks fresh and new. It is really amazing.
But I have a problem that sounds impossible! I can't input the note A with my A key on the keyboard. And I'm sure my apple keyboard works fine. When I pressed A , the note A didn't appear but the cursor is moved to the top of the bar. And everything works fine on MuseScore 3.6.
I've tried reinstalling the software, resetting the shortcuts, and change another keyboard. But none of them worked. Could anyone help me?