I'm having the same issue with a bunch of reolink cameras connected to a Ubiquiti wifi system and a pfsense router. The router keeps reporting DHCP requests from the cameras. When I first discovered the issue, I thought Unifi Controller was at fault because it was reporting that several devices are getting the same IP address when in reality they each had a different one assigned to them by pfsense. pfsense log showed lots of dhcp requests from the reolink cameras. I updated everything to the latest release edition and the problem persists. It was only towards the end that I noticed that only the Reolink devices on my network (about 14 x E1 Zoom / Outdoor cams) were causing this issue.

I have since given the cameras fixed IPs from pfsense. The problem of unifi reporting repeat IP addresses is no longer there. But on the DHCP log on pfsense, I see a lot of requests coming from the cameras. Something isn't right and needs addressing @ reolink!