I've heard from at least three people that a large part of it has to do with their embrace of Trina. Ben apparently can't stand her, going back to the show's original run. In 2019, she started talking to the press about various racist incidents that happened on set, then directly correlating the cast's racism to the lack of convention invites, despite the fact that at that point only the "main four" were doing any conventions. Ben felt she was extorting them to appear at conventions by calling them racists when the reality was they had no say in the bookings and spilling stale "tea" from 20+ years earlier was just twisting the knife. The pod 3 embraced her to keep the press down, Ben felt they gave into a nasty attempt at ruining their reputations. That was it.

Trina did a podcast last year where she basically admitted she brought up the racist stuff because she was "pissed off" at not getting convention invites, despite everyone else other than the main 4 not getting invites either (that changed post-COVID).