How many times does it have to happen

https://www.chess.com/game/140735126566 0.3, 0.2, 0.1, all pre-moved. last I checked if you have 0.1 and the next move is Mate or a Draw it will register.

If you only have 0.1 available, you can't make the last moves since premoves take a minimum of 0.1 second and your clock would be out

In the past there were cases where that wouldn't happen but it was changed.

https://www.chess.com/game/live/140740185074 what about this I won in the same situation 0.1 for 2 moves it claimed the win

It's possible the code still has some bugs.

Though I guess it's possible you actually had slightly over 0.1 actually before your last move and then while ran out of time

Turutu rutr

This is what happened