Clock cheating

So I just played a 1 minute bullet game a my opponent made 20+ opening moves using ZERO Nada , no time at all . I have recording of the game . Please explain how this is possible. https://youtu.be/7ugZK8O6S6o

Not sure what happened in your case.

But this morning I had this clock_kept_running_after_move bug.

not to #20 , your oponent play prémoves from start to #15 Tower xd1 the point where he start to spend hes time clock.
nothing special in my opinion.
after #16 your vidéo goes back to #14 ,as we can saw your queen resurecting :)

i note than after #14 bichop b2 you was able to save your queen.
it appears than the #14 move of your opponent is a blunder caused by prémove

better looking will be the link to game

hop!