I am familiar with the problem. Well, it was a year or year and a half ago I encountered it with a demo vault I downloaded. Looking at the unusued dashboard/hub now, the MB buttons are elevated out of the tabs blocks. I remember problems with it before with Obsidian Columns plugin.
Here is a bug report as well.
How’s Reading Mode doing? You could force reading mode once you are done with the building.
(I even saw the Tasks plugin showing a notice about not being able to mark a task done through Live Preview; you see LP is tricky for others even today.)
BTW, the Columns plugin I replaced with this CSS at the time but it’s not as nice as the tabs blocks plugins.
Off the top of my head this is what I’d try until somebody can say anything better:
- Using Reading Mode if it works there
- Using CSS
- Looking for an alternative tabs block plugin (which you have probably had done already)