Well that's a new failure
You're viewing a single thread.
Weird. What hotend?
mostly out of the box one of these https://kingroon.com/products/official-kingroon-kp5l-3d-printer
I could be remembering wrong but kingroon are mostly groove mount v6? It's even more puzzling. Are the threads ripped off on the nozzle or block or did it unscrew itself?
I didn't check but the threads on the hotend are in good shape. It must have unscrewed itself. I think I can barely see some threads in the picture.