Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
I haven’t been able to replicate this in my unit using Firefox. I tried this for a scout who has both a registered unit-level leader parent and a parent who is an MBC, but not a unit-level leader. I RSVPd “Yes” for both parents, but left their scout’s RSVP as “Maybe”, and the parents showed up in the report as a “Yes”, while the scout showed up as a “Maybe”.
Was there a particular browser under which this was failing? Is there maybe something unique about my test case that’s causing it to work? I don’t have another MBC parent who isn’t also a unit-level leader of some sort to test with.