@db0 Might be, I can't be sure if it's just the first one, or random. I don't really want to try, my instance admin might not be too happy with me posting too many test posts in the name of science.
Though the weird thing is that it just straight up denies it even if the other groups aren't Lemmy or federate with Lemmy, which Guppe groups don't.
Link to my post containing multiple group mentions and one Lemmy community:
https://chaos.social/@Draconic_NEO/113406243431431881
Link to post containing two Lemmy communities:
https://chaos.social/@Draconic_NEO/113406248999089892
@NataliaTheDrowned2 Yeah that place is pretty awful, the cherry on top is the admin replying with personal attacks and insults. Definitely needs to be blocked
#Fediblock (for visibility)
@db0 on Mastodon it just boosts the posts, I assume that's what Lemmy also does in addition to copying it and formatting the data as a post.
If I oversimplified or got that wrong I'd definitely appreciate if @dessalines or @nutomic could correct me on that. As far as I know there doesn't seem to be a reason why the same post can't appear simultaneously in multiple communties, since they're just boosts and duplicates on the federated instances. @lemmy_support