Solutions
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CorneliousJD's post in Help - Static MAC on Docker Container (Not sticky after server reboots!) was marked as the answerFYI incase anyone finds this later - the mac address didn't follow the IP and kept changing (i had the docker IP set static and it still changed)
I ended up just using wg0 tunnel built into unraid to connect proton VPN and push the traffic for hte container thru that.