I recognize that this makes the Delete activity work differently for S2S than it does C2S, which is to say that a user or client cannot distinguish between "soft delete" and "hard delete" this way. Otherwise, the "cache invalidation" idea is a sensible one.

@hamishcampbell @ricmac @evanprodromou @julian Thanks for your kind words. I won't interrupt your discussion with Julian anymore. I hope you reach some accord!

In principle that sounds like a problem with NodeBB or other platforms you are using. Lemmy doesnt do anything special to fetch remote communities. But if you notice any error responses served by Lemmy you can open an issue.