Massive Jhin Bug
In the practice tool I was dicking around a bit with SKT
before discovering in the current patch if you wait 1+ seconds between the cooldown prior to the fourth shot of his ultimate, you can fire the 4th shot twice, crit and all. I reproduced it consistently in a bot game, and I think this is pretty game breaking for Jhin, especially at early levels.
Here is a clip of me consistently reproducing the bug in the practice tool.
https://plays.tv/s/LRC67EDC-Hdi