This was brought to our attention on the Reddit forums. This did just happen to me in the dungeons as well today. I was blocking with stark spidey while AV used an L1 and then stark auto evaded but stopped before AV's L1 was over. Stark then got a bleed debuff and died. Please fix this soon.
https://www.reddit.com/r/ContestOfChampions/comments/8ip1yg/this_is_bs_please_fix_this/