casino credited my btc after price moved and amount looks short somehow

Sent BTC in to deposit, checked the transaction after two confirmations, but by the time the casino credited the funds, BTC had dropped almost 1.5 percent. The USD amount I got looks like they gave me less, but support says it’s based on when they process not when I send. Feels sketchy, since that small time gap can really add up if the price moves a lot. Anyone have more experience with how other places handle this? Feels like a risk that’s tough to manage, especially when you want to play live dealer and the timing matters. Curious what the common practice actually is here.