This question has been asked million times for different casinos, withdrawal will "trigger alarm" - deposit won't, that is the way how 99% gambling sites are working and no matter what you do you can't change this fact.
Many sites also like to freeze deposited funds which is kinda shady if you were to ask me ie I don't mean fund that you won, but if you're freezing an account with funds atleast let the regular deposits be withdrawn (provided they're not already lost in gambling)