I don t know if it s related to 18.4 but since a week or 2, it happen to me all the time.
When mezzing mobs on my crat or NT, those mobs continue to hit even if mezzes are still active in the nano target window.
Pande can be a complete nightmare when pinks move freely or heal everything around while mezzed or TNH under LMN that continu to hit team.
Some mezz break without any reason too. Am I the only one with this problem ??