Potential special attack not registering bug

UnDEADGamer

So during my alliance war tonight i had to face a nick fury on vigor (tier 9 war), i got him down to his second phase and waited for an opportunity to slam him with sunspots sp2, after hitting into my block a few times he goes for a heavy to which i intercept and then hit sp2, but my special attack didnt register any damage at all, sunspots model was inside of nf and did no damage and i got combo'd afterwords. I sadly dont have any footage but has anyone else had an issue like this?