Why this was a draw in Chess.com?

It was white turn to move, s/he let the time running out and then the app says "Draw, insufficient material.."

see the situation below:

https://lichess.org/study/CR5B3jwq/DttDme8A

Now you know why the FIDE / lichess rules are the lesser evil.

Because they are more interested in making money than in fixing long-standing trivial bugs?

And you also know why s/he let the time run out.

under USCF rules this is a draw. Material you had is listed as not sufficient for timeout win and

14F3. Winning position irrelevant.
33
US Chess Federation’s Official Rules of Chess, V 7.1 Edition 7-19-19
If a valid claim exists, the game is drawn regardless of the position. Even if the opponent can show an immediate
checkmate, the game is drawn.

So best possible play by opponent on chess.com or USCF rules was to let clock down.

@petri999 said in #5:

under USCF rules this is a draw. Material you had is listed as not sufficient for timeout win and

14F3. Winning position irrelevant.

I am not a USCF player, but looked up 14F3.

That rule is about 50 move ruke and does not apply here.

Also under USCF rules this is a win for black. Rule 14E deals with 'insufficient material to win on time'. Rule 14E2 has one of the conditions in which a player who exceeds the time limit still scores a draw: 'opponent has only king and bishop or king and knight, and does not have a forced win.'