Thanks Andrew, I will render a problematic song and send to support. Your info led me to solving at least part of the issue though. I’d forgotten that I’d replaced the bass real track from that style with another. I’m sure that just confused the holds functions in mixing styles. When I reverted the replaced tracks I’d used they worked ok. At least I have a more efficient workaround to do that now- I can fly both versions of instrument track into my DAW and select which to use, culling the other.
One step closer! Thanks!