how is this not a checkmate??

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palomarobles
https://share.icloud.com/photos/051OCuYEb-rbY1zqRSzBBXJ2A

My last game ended like this, it said my opponent (white) won on time, but shouldn’t they have won by checkmate?! I’m really confused
SpinningQuantum

maybe this happened because of lag (you ran out of time before they made the move but because of lag it made the move) 

artemisia39

It's not mate because black can take the checking pawn with en passant

palomarobles
Thank you!!