The best is to avoid using VPNs. The VPN is problematic, I will continue to say that. This is not to side with any casino, but to avoid having an excuse against you, whether the excuse is true/genuine or not. Some will be dealing with a KYC casino and still use a VPN, why? Haven't they known you already?
As surprising as this will be, many have already gotten use to using VPN anytime they’re visiting a new site in their device. It could be casino or another platform, but they feel using a VPN will put them in a state of peace of not showing to the casino or the platform where they’re from, they call it maintaining their own privacy. They do this not knowing that some casinos are just looking for an excuse to deny you your big win. So staying away from them is the best especially when you are involved in a centralized casino and have submitted your KYC before with them.
Even if you pay for a dedicated IP, do you know what they've used it for in the past?
In a situation that you can’t tell whether an assigned IP to you is not confirmed to be flagged before for illicit activitie , it is better not to even engage on it and stay away from them to avoid damaging your account and reputation in the casino.