Thanks timmse. I’d already figured it out by adding a 100% width div set to flex. Might be worth adding in the documentation not to change the display setting, or simply remove the display settings from the drop down that break things.
Ok. In your case, it’s the WPGridBuilder facets within the tab content, which is either a configuration error or actually a bug in the interaction of the facets and the tabs - but a different one than the one reported here.
First, please check whether the facets outside the tabs work as they should. If so, please create a new report on this topic.