Constant BGW320-505 crashing

I've had ATT Fiber for about 6 weeks now. Within that 6 weeks, my BGW320-505 has dropped service multiple times per day, every single day.

My modem is setup in passthrough, with everything disabled and traffic being forwarded to my Unifi UDM PRO SE.

I've had a tech out to look at the line, I've had the modem replaced, I've had the line tested multiple times. From what I've heard, nothing is wrong with either the line or the modem. Except that the modem is constantly freezing and causing me to have to power cycle it to get service back. Each time, I can confirm my modem is down by no longer being able to connect to the web interface through the modem's IP address. I've also started testing through the Smart Home Manager app, as suggested by the tech, which also shows the modem is unavailable.

I've done everything I can think of that could possibly be an issue on my end. I've run cables through a cable tester and swapped them out, I've changed which WAN port I'm using, I've tried enabling and disabling firewall features on the modem, I've tried throttling the connection from my router, but nothing has made a difference.

ATT keeps trying to tell me the issue is my equipment somehow. My equipment is all rock solid and setup to log every time my service goes out. My equipment has a current uptime of 12 days, and not a single time within those 12 days has any of my internal traffic had any sort of problems. My internet keeps dropping while I'm on calls for work, when I'm sitting down for the evening to watch TV with my family, and randomly overnight when nothing is going on.

I'm a few days away from just cancelling my service and going back to cable. I may not have the same speeds, but at least I'll actually be able to use my internet reliably.