XR500 LAN IP DHCP glitching out

So occasionally (Usually 3-14 days uptime), the router stops assigning LAN IPs. Usually first, I can no longer access the DUMA OS interface from LAN. Then the internet stops working and I can't visit anything except 1.1.1.1 (Which happens to be my primary DNS server for the router in internet setup). Then the LAN IP of everything (WiFi and Ethernet) go away. However, I still have internet access from the router as I'm still able to remotely access the router with the "Remote Management" feature using my iPhone while connected to my cellular data (I always use a VPN during remote access to keep the login credentials and my WAN IP encrypted). So I think that proves that it's a LAN issue and not a WAN/ISP issue. The solution is usually to just change the routers LAN IP from 192.168.8.1 to 192.168.1.1 (Or any other number) and then change it back to 192.168.8.1 after that. However, while that lasted good for about a week, after that, almost half of the R-Apps were taking longer to load than expected. I clicked "Ok" on the notification and waited 30+ minutes while I was eating dinner and it was still loading when I came back so I had to reboot the router. Rebooting the router always fixes the problem, but it's not ideal to have to reboot the router that often. Today was a litle bit different. The router stopped assigning LAN IPs for like 5 minutes and then it would fix itself. Then 10 minutes later, it did it again and then fixed itself again. Once I got an IP, I logged in and tried going to Hybrid VPN and then it gave me a message saying "Uncaught SecurityError: Blocked a frame with origin "http://192.168.8.1" from accessing a cross-origin frame." and then I got completly locked out of the router (Meaning "192.168.8.1 took too long to respond"). I always access the interface from LAN on Ethernet so it's not a guest network issue. Here's my "LAN Setup" configuration:

Device name: XR500

IP Address: 192.168.8.1

IP Subnet Mask: 255.255.0.0

RIP Direction: Both

RIP Version: Disabled

Use Router as DHCP server: ✅

Starting IP address: 192.168.8.2

Ending IP address: 192.168.8.23

I have IP reservations all the way from 192.168.8.2-192.168.8.23 and it has all of my devices' MAC addresses and no I'm not using random hardware address/MAC spoofing on my devices so that's not the issue. IPV6 is also disabled.

Also, is this the issue I might be dealing with?

https://community.netgear.com/t5/Nighthawk-Pro-Gaming-Routers/XR500-intermittent-network-issues/td-p/1940649