Constant connection losses, everything from my cable modem to the pedestal is brand new.

I moved to an area serviced by Xfinity back in September. This house was connected to another provider at that point, and Xfinity came out and ran a brand new line from my house to the pedestal two houses down. I constantly lose connection, at random intervals, for random lengths. They've come out and re-run the line (long story short, it got yanked out of the pedestal before they could come bury it, I replaced the connector cheaply, and the guy who buried it just tucked it under fences when he could, told me he'd replace the connector, a second tech came out, saw my cheap connector and replaced it, third tech comes out and replaces the entire line and it's re-buried), the 3rd tech even re-ran the line from the box attached to my house, through the attic and down the wall, brand new wall plate too. I've even replaced my cable modem (old- Arris SB6190, new- Netgear CM1000v2). There are no other devices hooked to the cable system, no splitters, nothing.

Yet I still get these random disconnects. I mainly watch streaming video, so it's not as much of an issue for me as the majority of the outages are quick enough that I don't run out of buffer, but my kids play Roblox and any time there's any sort of high latency / packet loss, it messes the whole thing up for them.

Is it possible this is an issue further up the line? I'm happy to post any diagnostic info needed. Thanks!