problem again today.
8.00 (06.00 GMT) the first games , everything was fine , a draw between the groups.
In the 2nd round at 16.00 (14.00 GMT), after some minutes the games started, we had connection lost.
My game was the third.
When I went to watch the 4th game,it stopped and never came back, just after about 20' min the games were over.
I lost 0-2 from a lower q team , our group disqualified and missed the chance to play in the 7th final .

For me it's obvious there is traffic jam at some hours (it looked like when new games were started, the server crashed).
There must be something about to have a bigger variety in games hours (or maybe days ? I don't know).