@lina lol, are those screenshots? but yeah, I think what you're experiencing is a state reset. Are you self-hosting your server, or what are you using? many rooms are intentionally attacked by spammers in order to cause state resets, some are caught by tooling, others are fixed in spec, but there are many ways to fuck up a distributed system we still don't know about. I remember when the TWIM room was similarly affected, it required a full room upgrade to fix it for everyone, but if you're self-hosting it, it might be useful to do a room purge. If not, it depends on what client you use, but if it's element, go to settings, help and about, then click clear cache and reload, that should improve the situation somewhat.