Range extender keeps changing MAC addresses
I have 4 tally lights that use wifi to operate. Each one has its own IP address, which is how they are controlled. I have a Medialink AC1200 router that has the ability to permanently set each tally's IP address based on MAC address. I need to do this so I can access the tally each time it is used. The tally lights were changing the IP address each use. This is why I set the IP address for each to static (supposedly never changes).
I tried today to use them again, but they still had different IP addresses. I went in to the router settings and there were new MAC addresses for two of them. For the new IP addresses there were also new MAC addresses for them. The other two were still as set before (same IP and same MAC as before).
I assume that the RE230 is changing the MAC addresses. Does anybody know how to control the MAC addresses so they are the same each time the tally lights are used?