Notes App pen drop downs + icon disappears and stops working when it shows again.

I use my notes for school on the IPad pro 2nd gen 12.9 inch and I’ve encountered the problem that the + icon disappears. It happens when it bugs out when I try to copy paste or duplicate a form sometimes. The copied form doesn’t move with the lasso tool or the little yellow „…“ icon. After I somehow get out of the form menu (which replaces the pencils for a stubborn amount of time) it doesn’t get erased or deleted anymore. After closing and restarting the notes app the plus Icon disappears completely. It only reappears after a while or if I add a form in a picture (mark up mode again). But if I exit the picture the functions in the + icon are displayed but don’t react when I click on them. Restarting my IPad does nothing. I really hope someone can help me with this I love working with notes I think it’s really underrated. Thank you in advance!