Everyone can get hesitations or distractions where something like this could happen. But those are human mistakes. Blaming the game or the mechanics of the game is projecting. Because honestly, it's his own fault. If it is indeed true.I mean, seriously, the only way I see this happening is if:
1: The dude about to get a flawless suddenly had a stroke and was twitching on the ground instead of actually playing, or just decided to roll his or her face across the controller at the end (even then, you'd think they'd land a lucky shot doing that lol).
2: The mechanics of the game suddenly changed (as pointed out by @Rozalin1780).
3: @EarlyReflections is lying his ass off.
I think the answer is obvious XD