Probably related to this issue: https://github.com/matrix-org/matrix-appservice-irc/issues/1724
The bottom line of that issue seems to be that the IRC <-> Matrix bridge was patched to address the message dropping issue where some (many) messages weren't crossing the bridge. They deployed the patch about a month ago, but as many can see, it issue is alive and kicking!
Just to cross our T's and dot our I's. The bridge we run is Matrix <-> Discord/Telegram/Something-else?
Since Matrix clients can't really connect to IRC channels [1], whenever we go to e.g. #opensuse:libera.chat we are actually joining an IRC <-> Matrix bridged room. And Libera.chat's Matrix instance is run by Element nowadays [2].
Now, when we join #support:opensuse.org, we are joining an IRC <-> Matrix (or Matrix <-> IRC, whatever one's personal philosophy is) bridged room, but the Matrix instance is hosted by us instead. So, the ones that set up the bridge was the Libera.chat/Element folks, then? Based on Jacob's answer, it appears so and makes sense now that I face this fact.
- https://libera.chat/guides/faq#can-i-connect-with-matrix
- Fact picked up while lurking on #libera-matrix:libera-chat: https://matrix.to/#/!vjOdckstTLwMkKHIgz:libera.chat/$71uJNLMX01iFOBbYAVy5gcHmkgX3jffdAzxt7cYDtWU?via=matrix.org&via=libera.chat&via=mozilla.org