Stuns being weird

swizlerrr

I noticed lately that stuns are a little unreliable where you hit the defender but somehow are still able to react/throw a special when they shouldn't have the ability too i found a couple instances of this ,i posted a photo cuz i cant ad a video, the hit obviously went through but somehow phases through them like they weren't hit then they throw a special and completely ruin the rotation has anyone else experienced this?

swizlerrr

This happens at the end of the stun but iv already put in the input for the hit before the stun ends iv had this happen with ultron as well or characters that have a longer stun