It might be working for you but I think its walking a fine line.
My RD account also knows my IPV6 number which cant be hidden under SS or IPVanish right now. I have RD set to Internet Protocol for IPV4 but it still sees my IPV6 address. My home ISP provides both simultaneously. I only use one location at a time.
Its working for you so i cant argue but RD might figure it out one day.
Edit: I was checking my account on my phone with IPV off. When i turned it on it only showed my VPN address (ipv4). But it does know i am using IPV. So I think your way will work (as it already is) as long as you are always connected to the same vpn address.