Bront,
What happens when you reduce Engine RPM to Minimum Power On Nr momentarily and roll the throttle back up to full throttle as set before the Compressor Stall occurred?
If you lower the Collective first and attempt to cure the problem that way and it does not work.....the next thing you are told to do is turn on the bleed air heater and anti-ice.
What does that action do for you?
Can you not get much the same reaction by slowing the engine RPM....and reducing the flow of air to the compressor?