Questionable app activity

I had a checkmate in 2, and my opponent ran down the clock. But when it got to 0, nothing happened. I waited a bit longer and refreshed the window and then it showed that I was the one who had lost on time. Is it possible to get those points back? This is the link to the game lichess.org/1n8Ubgjj

Signed, a disgruntled chess player

Sometimes when you are low connection the server between lichess and you will be delayed for like 5 -10 sec depends on how higher your ping or ms is.. So it is possible that you disconnect at that game without you knowing and running your time to 0.