Here is another workaround. Save project duplicate. Open second instance of BIAB > open your project copy>browse styles - "destructively". Listen side by side: First instance of BIAB (original) VS second instance (dupe).

But....as DCRon said:

"It's a bit of a workaround" - That phrase should be illegal or at least considered to be a curse word smile

I don't want to bore anybody, but there was a veerryyy lengthy discussion some time ago on "UNDO". Most of participants agreed that UNDO should undo whole single action, even if it involves 100 automated steps.

Bottom line, without proper undo process unfortunately is destructive. Best solution is to have both: Proper Undo and Save Snapshot of the project, so you can revert back to original (last snap) from any rabbit hole.