Guild Wars 2

Had a bug in Cliffside Fractal today where during the final fight, the Arch-Diviner did not drop the hammer on 0% health.
We stuck around, hoping he would become damageable again or at least drop the hammer at some delay, but he restored his health to 100% and then remained invulnerable while being able to attack us.

Obviously, we were unable to finish the fractal because of this and had to abandon the run.
Is this a known issue that pops up from time to time or did something go awry.

I ran into that bug just last night. You just have to wipe and reset (All party members must die). the Seal will regenerate to full. After that you will be able to damage him again.

This happens when someone wants to pick up the hammer too early. If you don’t spam f when he gets invulnerable but wait a bit til the hammer appears, then it will not bug. Though this is very annoying and should get fixed.

It’s a known issue, and as said, you just need to wipe.