With "User OpenGL" checked in Tools/Options/Libre Office/View, menu items disappear if Libre Office moved to 2nd screen of a 2 screen workstation. When I move the Libre Office initially opened application between screens, clicking on say the Tool menu item will show all submenu items in the drop down list if in screen labeled #1, but the submenu items are missing in screen #2. Unchecking "Use OpenGL..." fixes this.
Steps to Reproduce:
User Profile Reset: No
OpenGL enabled: Yes
Seems the same as 99521 (the description is slightly ambiguous), thus I'm closing as duplicate. If you think it's a different issue, please reset status to UNCONFIRMED.
*** This bug has been marked as a duplicate of bug 99521 ***