ERR_NETWORK_CHANGED: connection was interrupted every several minutes

Hello,

I've called numerous times about this. I am constantly getting the error. This is with a Gigabit connection.

I'm getting "ERR_NETWORK_CHANGED: connection was interrupted " with quick, brief outages, most lasting just a few seconds and not actually completely disconnecting. I've been given numerous "causes" for this including the WiFi (third party router - the problem was occurring before I purchased it), but my main box is directly connected to the modem.

If I'm streaming video on Zoom or something else - forget it. 

I am a Web Developer and my kids are schooling from home right now so this is an absolute nightmare. I'm not a network admin, but I have enough knowledge to generally know what I'm doing and I can't think of anything else to do to fix this on my end.

This can occur when the network is being heavily utilized and also when it isn't.

Thanks!

Chris