For what I observed, while under heavy fire, casting any ability just has no animation as it seems to interrupted by the damage flinches animation. Steps to reproduce bug Go to the simulacrum Spawn low level, high rate of fire enemies (Attack Drone or Corrupted Drones) Attempt to cast any abilities while under fire Frames I manage to reproduce bug with: Banshee Prime Trinity Prime Oberon Prime Nyx Prime Harrow Titania