Resized Image page, I clicked on the "add description" except the window doesn't expand to show the text I pasted in, as it's done before. Instead, it shows scroll bar horizontally and expects me to use the arrow navigation to move vertically (no scrollbar). Therefore, I can't proof the body of text I've entered. Only two lines of text are visible.

I've tested this with the nightly build and can reproduce the problem in the default theme. The edit box expands to normal height when the description is clicked, however the size shrinks when you start typing. Please create a ticket for this if you haven't already.