I've been experiencing this issue since about August when the router just completely factory reset itself overnight, wiping itself clean. Since then whatever static IPs and port forwards I set up on that first day, are what I'm stuck with now. I can't add anymore static IP devices either, they appear on the list but then just disappear.
As far as the port forward rules, the 5 or so I have set up after the factory reset are working without issues, but every time I add more, they appear on the list but don't do anything. They don't work and a Router reboot wipes them off the list.
The last post on here is from November 2022 saying a firmware update isn't far off. It's now 7 months later and still nothing on how to resolve this issue. Obvioulsy this is a major problem, a simple google search reveals a bunch of posts from here, Netgear and Reddit, yet no one seems to be doing anything about it.
Can SOMEONE please take some responsibility for this and fix it! Very poor form by both Netgear and DumaOS on this.
(XR1000 running latest firmare V1.0.0.68_1.0.54)