I became aware that I had missed a message on IRC. The sender was on matrix and I was on IRC. I haven't seen them there (#winehackers) in days. I suggested the IRC-matrix bridge was down, and was pointed to the following links, which seem likely to be relevant. (I don't know what type of bridge has been in use for this channel since the move to libera.)
https://libera.chat/news/matrix-irc-bridge-updates https://libera.chat/news/matrix-bridge-disabled-retrospective
Who knows what other messages may have disappeared in the ether.
-- Jeff Smith