Intermittent Connection

I recently created a thread regarding my connection drop when playing online games. However I felt the need to create a new thread with a new title as the problem I am having is not just locked to online gaming.

The problem I am facing:

I have been dealing with this issue for the past few weeks of my Internet randomly disconnecting. When I say "disconnectin." I mean wired connections through Ethernet and WiFi connections are getting disconnected. I sometimes have to reboot the gateway to get it back. While other times it will come back on its own. I have also tried logging into the web interface to see if there was any error logs, and I see no error logs. This problem is happening with streaming video, gaming, etc. I have been getting kinda frustrated lately with this issue as I do not know what's going on. I have called Comcast support line, and have been told that I would have to have an extensive diagnositc team look look at it but haven't received a phone call back.

Summary: intermittent disconnection wired/wireless

Current Equipment setup:

main line inside our smart box in the house ----> into a four way splitter---->living room coaxial cord connected to the splitter---> in the living room coaxial cable going from tbe wall jack----->  Back of the XB6 gateway

Things tried to fix the problem:

Replaced splitter

Replaced coax in living room

Tried wifi

Tried wired

Tried using the XB6 as a modem via bridge mode and using our own router

Tried rebooting

Tried resetting the gateway via the web login interface

I am wondering if there is something wrong with my XB6 gateway. I have at most 30 connected to the gateway at one time split between 2.4 ghz and 5ghz bands. The Comcast support line has told me there is no issue with the signal into my home. Can someone help me understand what I can do to fix this issue I am facing?