I believe I have found a bug with the AX55. I have two seperate AX55 routers (physically they both say HW V1.6, but the software says V1), and now both have displayed this behavior. 

On firmware 1.5.11 Build 20251119 rel.49503(5553) when connected to an OpenVPN server hosted on the AX55 and attempting to access the router's management page via that VPN (192.168.0.1 for example), the AX55 will reboot entirely. It goes through a normal startup process, all the LEDs behave like you've just turned the device on, all that jazz.

This started when I noticed that i couldn't access anything on my LAN via my VPN. Upon some testing, I found that it would reboot under the circumstance I had previously described. I had an older AX55 running firmware from 2023 and the VPN functionality was working just fine. Upon updating it to 1.5.11 Build 20251119 rel.49503(5553) the same issue started happening. 

This is extremely frustating, as the firmware cannot even be rolled back, and that note isn't made clear anywhere except if you download the firmware manually.