Looks like there’s a fix incoming: https://github.com/LemmyNet/lemmy/issues/4288#issuecomment-1878442186
FYI, on lemm.ee I have been testing 0.19.1 patched with the #4330 changes by @phiresky for the past week and have noticed no further issues with outgoing federation, so I think this issue will be resolved with the next release
That patch has been applied (https://github.com/LemmyNet/lemmy/pull/4330) so now I guess we’re waiting for a release to be cut. Fingers crossed.