en.lichess.org/yFzkcaPt7583with all due respect to my opponent's effort, i think lichess should correct this bug ASAP
No, you would go into the corner and get +mated hehe :)
How is this a bug? According to FIDE rules black has material with which he could mate. Sure it's a draw and a fair opponent will give it to you (though its not easy to offer draw in time trouble) but it's not a bug or anything.
Draw because insufficient winning chances seems to apply only to rapid and standard so MoistvonLipwig is right it seems.
http://www.fide.com/fide/handbook.html?id=171&view=articleG3
In this position the pawn is giving winning chances, so no it should not be a draw.
fr.lichess.org/yFzkcaPt/black#127