The last few updates that we ran on SP PageBiulder resulted in CSS breakages for SP PageBuilder elements. For instance, columns were lost (items stacked instead) buttons lost all their padding.

Usually I would expect a cache clear to resolve it, it doesn't. Interestingly, the last 2 times I fixed it, the fix wasn't the same. Once, I turned off CSS/LESS compiler in my template, and today what I did was "Disable default CSS" in the SP options. Once I did that, the columns and button styles all returned.

I noticed was this console error, which PERSISTS after the fix. :: The stylesheet .../index.php?option=com_sppagebuilder&view=page&id=22 was not loaded because its MIME type, “text/html”, is not “text/css”.