Consider yourself lucky then if this whole story is true, maybe that was when the hashrate plunge because miners couldn't sustain the cost for mining, resulting to a much slower confirmation of transactions.
One thing about finding bugs in a site, is first they keep it secret, and have it fix because giving a bug bounty is way expensive than letting you cash out with all the wins of 0.02 BTC.
Another reason why they may not be admitting that there is a glitch even if they know there is one is to try to maintain their reputation, if they were to admit that there is something wrong with their games it's possible that they could lose some gamblers because of the news, so they prefer to deny what's happening and tell everyone that everything is OK while internally they are working very hard to try to know why this is happening and to try to correct it as soon as possible.