Hello, I've updated MusicBee for probably the first time in the quite long while I've been using it and this gap between the main panel and right sidebar has appeared.

From the panels configuration settings, I'm guessing that it's the right main panel, but even though there are no elements in it and settings says it's "not displayed", it's still there.
Any help on how to remove it please? The only thing I can to is dragging out the right sidebar into the free space, but the huge artwork doesn't look very nice to me.