Well...no, it does not disappear. And my next step today will be to disable each of the action rules (there are a few) to see if I can isolate. I saw your comment on someone else's post which was good advice, talking through disabling actions essentially even if it doesn't seem like it would cause it. Might just be missing something.
Unfortunately, disabling the action rule for good is not an option. This all sounds very similar to: "Doc, my knee hurts when I do XYZ." "Well, don't do XYZ."
I'll drop a note if I find anything. Again, the action rules aren't exactly doing anything crazy aside from setting a variable that hides/reveals a section.