https://s3.amazonaws.com/zotero.org/images/forums/u16021261/rr9xlm6yx25o4pu2hhlp.png

Hello, So I was trying to write something on this page, and then I tried to use the eraser to cancel it. The first time, it cancelled it. However, I noticed that the cursor kept having the form of the eraser (a circle) even when I tried to switch back to pen. But the only thing it is doing now, it keeps writing, and it made that big long mark that was supposed to be an erasing attempt. I tried to update, close and open it again.. Now if I cancel, as soon as my finger leaves the mouse button, everything reappears like this. So I cannot cancel those blues lines, and the more I try to cancel, the more keeps writing on that page, urgh... Sorry I am kinda new here, what should I do?