Trial of the Sekhemas - Possible unintended interaction between Ashar + Chains of Binding Affliction

I noticed that while having the affliction Chains of Binding, when hit by Ashar a single time, possibly just with her poison attack, movement and action speed seemed to be almost halted (as if that single attack reduced action speed by ~80% or something).

I had the affliction for several floors, had been hit by plenty of other monsters, and did not see the same effect anywhere else. Unless that is just a separate part of Ashar's attack and not due to Chains of Binding, I believe this to be a bug. Maybe the poison is triggering the affliction many times?