Canasta - technical issue

I am tired having a big hand when playing players rated 1300 and above - after the first hand and the timer goes to 0:00 and the game freezes.  Sometimes the timer restarts and kicks me out of the game  this time with no loss of points (I'm guessing it was the same for my opponent).  Sometimes I lose points. This has happened well over 10 times in the last 6 months.  

I play on an Amazon Fire Tablet  BbyDckP54  Silk is my browser

Today this occurred playing  YouBer 1029 (Rating 1453) - my score was 1125, my opponent's score was -255, the timer froze, then restarted and kicked me out of the game but I didn't lose points.  How do players with high ratings make this happen?  I played 3 previous games with different opponents (all with lower ranking) and had no problems.  This issue happens far more frequently with an opponent with high rating - it seems they have the ability to exit the game without losing points or giving me points