Recurring Internet Disconnects – Need Help Beyond Basic Troubleshooting

I've been dealing with recurring internet disconnects for quite a while now, and I'm honestly running out of things to try.

My XB8 repeatedly loses connection and goes through the same reboot sequence every time: orange, green, then white. My entire house loses internet, and it usually takes around five minutes before everything comes back online.

I've had numerous technician visits over the years, multiple gateway replacements, outside cable repairs, and investigations into possible wiring issues inside my home. Nothing has permanently resolved it.

Initially, I suspected my gaming PC or network card might be contributing to the problem. I've experienced disconnects while gaming, downloading games, and even when the PC is simply sitting idle. I've also had whole-house outages when the gaming PC wasn't actively being used. When these outages happen, everything in the house loses connectivity, including phones, TVs, and other Wi-Fi devices. The XB8 itself appears to be restarting.

My PC is connected directly to the gateway through Ethernet, and I've also made changes to the network card settings and tested different configurations. None of this has resolved the issue.

The disconnects seem to happen more frequently in the evenings, and sometimes I'll have multiple in one night. I had four separate disconnects today alone.

Something else I've recently noticed is that nearby Wi-Fi networks seem to disappear and come back around the same periods. I haven't confirmed whether they're happening at exactly the same time, but it makes me wonder if there's something going on outside my house.

At this point, I'd really like someone to look into possible upstream signal issues, noise, or problems with the local neighborhood equipment.

I've been through the standard troubleshooting process many times. I'm hoping someone here can help get this escalated beyond another routine gateway reset or replacement.

Thanks for any help.