The majority here agreed that Stake is not at fault here and system lag is something that happens often, it can happen to anybody under any circumstances so it's better to prepare your betting to avoid such a situation I understand that OP has been playing for many years on Stake and is already a VIP and is not aware of it, as a gambler you should be aware of all circumstances that will forfeit your betting and your winning, Stake is not the kind that will forfeit your winning if you deserve it, you know that because you've been playing here for many years already.
I also think that it is not the Stake platform fault that @OP lost his bet. Anyone can understand the system delay and i think @OP is well aware of that too but since the result is unfavorable to him then he chooses to blame Stake for his losses. Now thinking the what if.. the result turns to make @OP a winner which suppose to be cancelled and due to lag the cancellation did not trigger and @OP won the bet, would he be creating this thread? I bet not.