This is driving me a bit nutty.

I just installed SW2025.  Suddenly, a bunch of planes are showing in an assembly - all of these are hidden at the part level, and I have cleared all top level overrides in the assembly.

Google is telling me that this is a result of mating planes in flexible assemblies.  Those planes are now forced to be shown.

I like to keep all of my planes hidden, and show them only when I want to see them.  I do not want to have to Hide All Planes in an assembly.

Does anyone have any experience dealing with this?  Essentially, I have lost all control of visibility of planes.

This has been fine for decades - now, broken :(