XB8 Modem not reaching max upload speeds

Hello,

I've been having this issue since December 2025. I have an XB8 modem with a 2gig plan, and I'm supposed to be getting up to 250mbps upload speed. When I got the modem in December 2025, it was reaching those upload speeds for a few days before plummeting to around 7mbps for several months. If I removed a connector or barrel on the line, it would go back to around 250mbps for a day or so before dropping back down to around 7mbps. It seems like once a month it reaches full potential then drops dramatically afterward. Lately, the upload speed has been steady between 30mbps-50mbps. 

I've tested my house line, the meter checks fine. All connections are tight and secured. I plugged the XB8 modem directly into my drop point outside the house and tested speeds, and the upload was still severely low. That leads me to believe there's either a problem with the drop to my house or my XB8 needs to be reprovisioned. It is my understanding that there should be an OFDMA channel in my upstream table at all times; however, it's only there on the rare occasion my speeds are reaching the max.

This is my upstream table as of today 9/21/26:

Regardless of what the issue is, I would greatly appreciate the support in figuring this out so I can run a business online without having to worry about speeds or upload problems.

Thanks,

Andrew