A guy doesn't lose any HP bug/cheat TFT
Not sure you can check TFT games somewhere but I just played a TFT game and people in it were spamming "report this guy" and stuff. After some time it was only me and him left and he was on 100 hp still. I thought it was pretty impressive until i beat him twice or three times without him losing any HP. He was laughing about it and after a few loses and me telling him that i'll report that he said that I can't report because he's gonna start losing hp/disabled whatever he's using to do it. So, either a bug which he can control or some software. I included the screenshot of the guy, not sure you can do something about it.