When I click out of the window, the top bar with the BBCode options hides itself moving everything in the editor up a few lines.
When I click back in, the cursor is not where I placed it. Instead it's 2 lines up in the text and code because the BBCode buttons pop back into view.
This is really annoying and one of the reasons I go back to the old editor because I'm used to just being able to type where I put my cursor. I have to slow down, think about where the cursor is and reclick to start typing. (The new editing window is much improved.)
Steps to Reproduce
Edit a page with the Euclid editor.
click away from the editing tab/window
return, but only click in a spot in an editing box. Don't click on the page first - JUST the editing box.
Now the cursor will be 2 lines up from where you clicked on the text and code in the editing box