I recently shared this video to the MCOC subreddit, showing that when I hit the opponent only my very first stack of Thanos's favor is paused, while the remaining 9 stacks are not paused, no matter how I'm hitting the opponent:
https://www.reddit.com/r/ContestOfChampions/comments/c6l3zu/bug_cull_obsidians_hits_no_longer_pause_the_timer/This greatly hurts his potential damage output, so I am really hoping this is not an intentional nerf. His ability to do massive amounts of damage with his armor breaks, thanos's favor, rout, and hulk synergy are what really make him such an amazing champion, so taking away his ability to keep Thanos's Favor buffs up for as long as possible with an aggressive play-style are really key to his overall damage potential.