[Gamebreaking Bug!] 100% Reproduction Rate, details inside
Ekko's time clone doesn't dance after he does, so you can't have them both throwing up devil horns at the same time. This is absolutely game breaking, and needs to be fixed ASAP. I have no idea how something like this got past the testers.
Steps to reproduce: Reach level 6, rank up Ekko's Ult once. Dance, wait for the dance animation to end and then wait 4+ seconds. The time clone will just stand there.