I had my version number(s) wrong. It's the 1.0.0 release that's supposed to cause problems: https://join-lemmy.org/news/2025-02-03_-_Breaking_Changes_in_Lemmy_1.0
Looks like there's only 11 of 70 total issues open for the 1.0 milestone https://github.com/LemmyNet/lemmy/milestone/24
C>A>B