Join new match (completely new match, with warmup still going)
Warmup! 30 seconds.
Start killing your teammates (just for fun -- because the game hsan't started yet -- it's a warmup who cares actually) and receive "now damage is reflected back to you!!!!!!111
Hit your teammate (ACCIDENTALLY), or have them get into your line of sight (by their own lack of experience)
Damage reflected to you!
Damage not reflected to you (because warmup has finished, and the actual game starts)
Instead, you get Warnings, just like the first time, and only after ignoring them -- damage reflect starts.