[BUG] Mektul, the Forgemaster boss not attacking and idle moving

Bug id: #4078107940

Mektul, the Forgemaster quest, boss got bugged

Whats supposed to happen:
1) Fight the boss
2) Boss goes into lava going into lava state
3) Lava is casting waves of lava, meanwhile boss is idle / slowed by lava
4) Boss leaves the lava and goes into fight state

What heppened for me:
1) Fight the boss
2) Boss goes into lava going into lava state
3) Lava is casting waves of lava, meanwhile boss is idle / slowed by lava
4) Boss leaves the lava and stays in the lava state while moving towards me
Lava state behaviour: slow movement, no attack, follow the player, model glitchy (looks like a broken leg when moving)

Basicially after the lava phase, the boss went to idle movement where I could only attack him to death, while he was not doing anything