Stun punch never disrupts. This is quite irritating. The ability requires that you successfully land a punch for it to have a chance to apply to your victim. To me this means that they should be interrupted. I can't tell you how many people hit recall as I stun them and still get to recall away.
Does it even do punch damage? I've never checked really. Seems like you can interrupt with a punch, sometimes.
I haven't noticed it do punch damage when I stun. That is what would actually be interrupting the spell. But I can say for sure its a 0% chance to disrupt with a stun. Or at least I've never managed it nor do I know anybody who has.
if you take off some armor you will see damage, but this could be a second swing immediately after the stun, i dont know for certain the issue with damage seems to be that wrestle without tactics doesn't produce damage on the AR we typically use
Yes, it's quite frustrating getting someone to 40% hp with stun primed and a held exp, get them stunned and watch them recall away because your punch didn't interrupt.