Reproducible crash against Jamanra

End of act 2 boss - crash occured 3 times in a row at different points of the fight (1st phase, 2nd phase, 2nd phase)

I use Nazir's Judgment quarterstaff - it has stun duration, a rare stat which could be in play as crashes always occured while Jamanra was Heavy Stunned.

My basic combo which triggered the crash twice:
1. Smith of Kitava's Temper Weapon
2. Wind Blast + Vaulting Impact to inflict Broken Stance debuff
3. Quarterstaff strikes + Tempest Bell to stun the boss
4. (Optional) Quarterstaff strike
5. Wind Blast 4 times, targeting the boss + bell (which gets ignited by Temper Weapon empowerment)

Support Gems -
Quarterstaff Strikes : Impact Shockwave, Rapid Attacks 1
Wind Blast : Fan the Flames 1, Armour Break, Armour Explosion
Bell : Rage 1, Execute 1
Vaulting Impact : Tectonic Slams, Fist of War 1

Character name: Svaalin