Dear @Susan_M_Davis , thanks for sharing. Now I was able to reproduce the issue. Or at least know why it behaves like that.
A quick style preformats fields in certain areas. The “Text” option is the “default” option, that automatically falls back to the format, that is defined in the quick area. So I’d say that is expected behaviour and not a bug.
Unfortunately, the quick styles can currently only be set per layout and not edited per field. The only solution is to move the fields out of that preformatted area and or to switch to the plain quickformat.
I personally don’t know if there was a recent change in that behaviour though. I’d have expected to be that way for a while already.
Sorry for not having better news…