Character dead without a reason

My character (Bille_Magic), in D2 Resurrected, in Hardcore Ladder mode, was shown as dead after a memphisto run, even though the game ended with almost 100% life. There was no crash or anything like that. My character still showed up as alive in the main menu, but I couldn’t join or create a game. After a restart, the character was dead. I know that dead characters cannot be restored, but I still find it extremely unfair because I invested a lot of time and it seems to be a bug