Menu disappears after adding a new item to the Functions Panel
If you try to add a new item to the functions panel, the menu immediately disappears after the first click and jumps you back to the to the "Map-control & panels" menu. If you then back out past the settings menu (back twice), the "set functions panels" menu will be displayed. In addition, if you try to re-enter the functions panel immediately after adding a new item (without going back twice) any changes you make will not be updated - possibly due to the edit functions panel still being open but not displayed.
I was able to reproduce this on multiple devices running 3.8.0 and 3.8.2