I got 20 extra seconds after my first move

I was playing 3+0 blitz and everything seemed to be normal, but I entered a game as Black, I played a move and I got 20 seconds added to my clock. My guess is that this is a bug or a glitch with the amount of time that you have to play a move before the game gets aborted and because I played as soon as the timer started, I got all of the time added to my clock. This is the link to the game: lichess.org/oiRacqBn/black#2

The game was played around the time of the Lichess server restart... maybe that had something to do with it? Seems like your opponent also received a couple of seconds on his move 2.

Yeah, that seems likely. I haven't been able to replicate it since.