Text entry fields get smaller if you backspace

I'm not sure if anyone else has noticed this, but when I backspace or delete when I am writing in the journal or writing in the details area of a new task window, the dynamic window gets smaller every time I have to backspace. By that I mean that the bottom of the window moves up a row, as if I have deleted a row out of an excel spreadsheet. Not a major thing, as I can just grab the handle and increase the size again, but when in the details area of the task window, it won't actually even let me re-size it at first, so I just have to "type by faith", until it changes the window and I can then re-size it. As you can see below, the handle is gone.



Has this happened to anyone else?