Yeah it's super annoying even when the "abandons in" timer reaches zero the game isn't over yet. Like things like that could cost you a whole tournament
Timer in tournament
Sounds like you had lag,
https://support.chess.com/article/423-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken
Yes might be a lag... happens to me twice for the unfinished game and i think 6 times for the timer...
To the admin, kindly check your system... one of my game in the tournament declared win to my competitor while the time is not yet done and I am winning the game.. in shorf. The game is not over yet. Another thing.. timer jumps.. thats why i wonder no matter how fast i move, it ends up losing due to time out.. when my dsugter obseved my game, my timer jumps.. from 36 to 23 sec then 16 to 11 sec..