BUG: Hammer of the Gods skill charge is lost when descending to fight Mektul The Forgemaster

If you have a charged up Hammer of the Gods ready to go it is currently lost when you descend into the fight with Mektul.

I was able to replicate the bug several times by charging it up on mobs around the area then descending.

Not sure if this is working as intended but I don't think so considering that the charge isn't lost on other bosses when starting a fight.