Eureka Orthos Floor 99 Boss Thermal Divide Bug

Seems to be unfortunate lag thread can be closed.

Date & Time: 14. March 2023
Frequency: Once (it kinda takes a while to get there :))
World name: Odin
Character name: Izuna Hyakuya
Monster name: Excalibur
Class/Level: WAR/90
Party or solo: Solo :)
Area and coordinates: Eureka Orthos Floor 99
Steps:
1. Play to the entirety of Eureka Orthos Solo
2. Do the first minute of the final bossfight correctly
3. Obtain Ice debuff from Frostforge
4. Stand in fire side of Thermal Divide out of the middle AOE
5. Die?

https://streamable.com/943hkm

I also lost my raising to a Lethargy Orthos Fitter doing their AOE instantly but there is another thread about it already.