I'm not familiar with betcoin's live betting since i've only tried them pre live but if the score changes while you're betting there should be a notification about an odds change asking you to confirm the bet for the second time.
On the other hand it could be just some bad timing since there's a delay. I also experienced this with other sportsbook when I was live betting some tennis match before I could lock my bet the odds kept getting smaller and at the same time my bet gets rejected.
you are not understanding the dispute.
It is not about the odds changing.
Try and read again the original complaint.
From the original content it seems me like, it's the matter of odd changing only.
When my team has scored a point and their odds was 1.6x, but as they scored a point and at that time i need to place a bet on 1.6x, then the bets will be rejected. This is due to the lower of the odds for the particular team.
It's common and can be seen in most of the sportsbook.
Rather there should be some settings in the sportsbook where you can enable to automatically accept the new changed odds while betting. This will help not to reject your bet.
Hope this helps you OP.