Bottom toolbar buttons are partially cut off when using fullscreen on second editor in Objects edit mode

Steps to reproduce:

1. As admin (advanced) go to http://localhost:8080/xwiki/bin/view/Panels/Children
2. Edit -> Objects
3. Go to second editor (Content) edit click on maximize icon

Expected results:

All toolbar buttons should be fully visible and properly displayed in Fullscreen mode.

Actual result:
The buttons in the bottom toolbar are partially cut off (approximately half visible).