(Urgent!) Notes are disappearing/deleting randomly!

Sometimes, about 1-2 times a day, notes I make suddenly disappear. I am working on a note, add another app in splitscreen, then the note I was working on is gone. I need help urgently because I can't use my iPad at school! Please help me and let me know if you know what the problem is or have a solution.

I already tried deleting and reinstalling, but it didn't help.

I am using Evernote on my iPad (Pro 12,9 2020).