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Note input (computer keyboard) is broken

If I use shift + arrow keys to move a note one octave up or down, sometimes it will glitch and move it up or down two octaves, however it won’t update the pitch correctly, yeah it’s really weird. Also sometimes it acts like I’m using shift select when I’m not

Ok I figured out why it acts like I’m holding shift or control even though I’m not. It’s because I click Ctrl + Tab or Ctrl + Shift + Tab to switch to a different tab. After that it thinks I’m holding control or shift, so I just have to press control or shift again to fix it. But I don’t know why sometimes it moves notes 2 octaves or notes and stuff like that