How do you report a bug in this game?

I was trying to run the 5 turn YingLong Strat and I noticed that my Feng Xun consistently gets his def down resisted by the boss on auto (around 5 times in 7 runs) even though he has 100% acc but the same team and works just fine manually and rarely ever gets resisted. I have provided proof in the video. Just watch Feng Xun every time on the boss stage. I feel like I’m going mad