Inscribed ultimatum crash

Game crashed while doing an inscribed ultimatum with the "Stand in the stone circles" challenge type.

This trial had those challenges :
Choking Miasma
Razor Dance II
Totem of Costly Potency
Reduced Recovery
Unlucky Criticals
Hindering Flasks
Unstoppable Monsters
Lethal Rare Monsters
Shielding Monsters
Siphoning Monsters
20% increased Monster Damage
70% more Monster Life

Bug report reference number is 515099666