Yes, that is a known bug of the recorder. After using it and closing it, there is a glitch that sort of locks out the space where the recorder bar is. The bar is no longer there, but it's as if the screen get's stuck with the space reserved for the recorder bar.
We already have a bug fix in the works, but in the meantime, try this workaround: After using the recorder and closing it, restart the Windows Explorer process. Just find the process on your task manager:
When you find it, right click on it and then click on restart. The glitch in the screen should disappear after that.