Can't upload to Musescore when I use midi keyboard on score

"401 authorization required"
I've uploaded dozens of other songs fine, but whenever I use my midi keyboard It has errors and when I try to click on the score link it says page not found because it never uploaded. How to fix this bug so I can upload to Musescore?

Update: I signed out and back in on the Musescore studio app and then it worked, but can someone still tell me why it is not consistent?