Meso Terminal Headsman bug

Date & Time: 9/9/2025 12:44 EET
Frequency: Twice in a row during the same instance
World name: Alpha
Character name: Miah Mhkapoh
Monster name: Ravenous Headsman (the second boss, leftmost DPS Headsman)
Class/Level: 100
Party or solo: Party
In-game time: 9/9/2025 12:35 EET
Area and coordinates: Meso Terminal
Steps:
1. Boss summons the three flail AoEs.
2. I go to one of the safe zones around the edge.
3. At the last second before the flails hit, boss uses the Holmgang looking pull move to move me to the center, which also immobilizes me.
4. All three flail AoEs hit me at the same time while I'm immobilized, and I die.
5. This happened a second time too after I was resurrected.

Are you sure you didn't just barely step outside of your circle? The boss pulls you back in if you try to leave.

The boss pulled me when I was stopped, like casting spells as BLM stopped.
I have never experienced the same problem before.