Intermittently Dropping Connections - Approximately 30 seconds to 1 minute every ~1-2 hours

I'm having an intermittent issue with my connectivity. It is not consistent, but about once every 2 hours or so I will totally drop inbound connectivity for about 30 seconds to 1 minute. If an interruption occurs during a video call, I'm occasionally told that I continued to be audible to the other person, though during the event I am unable to hear anything. I have tried opening browsers to connecting to the internet through various other avenues during an event and I'm unable to reach anything. This has occurred on multiple devices on my network, not just one.

The interruptions are also long enough that I am unable to play competitive games as they'll drop me from a server, which is disappointing as I am paying for high speed internet specifically for this reason.

Events occur irregularly, but often enough that there's never a day that I don't experience multiple drops. I'd say on average about one every 1-2 hours.

I have upgraded my router, modem and replaced the coaxial cable running from my wall jack to my modem with no improvements.

Any recommendations or help would be greatly appreciated.