OK I understand bets are supposed to sink some tcs, like when losing side has bet more than 5 times of that what winning side has and if no counters.

However what I don't get is, why must it also sink TCs when players disconnect / get disconnected. And not only that they lose TC in case they win, but that others don't get their TC.

I think it's not right, will it get fixed and can I ask for refunds?

1) The bets sink because you temporarily lose connection to the server. You need to stay connected for your bet to remain in the pot.

2) You bet at your own risk. If you lose it by this means, nothing can/would be done to help you get them back. Otherwise people could bet and "force ping" to keep from losing their tc.