Vastweld map boss hitbox unreachable with melee minions

I am running a witch reaver build, so all my damage comes from my reaver minions. They were unable to touch the boss at all, except in the few cases where the boss slams its arm on the platform.

I normally kill all map bosses within 10 seconds, and I spent 5 minutes at least on this one, and eventually died myself when the boss was at ~65%.

I'll remember to also socket ranged minions for next time, but this should of course be fixed.

Bug Report ID: #1296202719