I understand your concern for this, if we had high traffic and had multiple deposits coming in, it would be hard to keep track of who actually sent the deposit.
But because we are not a big casino and still in beta stage, the current system has been working without any issues.
For now, I will import a secondary and a third address to each crypto deposit request, allowing members to generate a new address each request, to easily keep track of their deposit.
That should not be used as a reason to keep your deposit system as what you have, almost all casinos started from a small casino with beta stage as well but they did it with better deposit system.
You have to change this system immediately to make players more secured and comfortable with the system.
You could add many things since the first day you came here, so I guess changing the way of the deposit should not be a big deal as it can be done easily.