So occasionally I have noticed (and not all of the time) that Ifrit on HM seems to occasionally resist a stun here and there.

What can be the cause of this? Diminishing returns?

I know I personally have not interrupted plume, but could someone else interrupting be the cause of it?

If so, is there any way to point it out to shut up some of the people that insert the "i've never seen it resist ur doin something wrong" crowd...