There’s a thread in the bug report forum. I see you posted in it after this but I’ll link it for those who read your thread and don’t know.
“Slaves to Saronite” daily MASSIVE BUG - WoW Classic / WoW Classic Bug Report - World of Warcraft Forums (blizzard.com)
It’s pretty nuts. My guildies have been memeing on it already this morning. Hopefully that all gets figured out because that’s a crazy bug.