CM2050V Spotty internet connection

Correct and Uncorrectables should be near or at zero across all channels if your seeing these then could be causing some problems. 

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do. These can be one cuase of the correct and uncorrectables seeing values. 
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/

I'll check all of those things and contact Xfinity again to get the modem provisioned, thank you!

👍

Another thing you can try is run www.pingplotter.com with a wired PC connected to the modem with out the Linksys, then with the Linksys in line. 

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Ryan-F wrote:

I'll check all of those things and contact Xfinity again to get the modem provisioned, thank you!

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Be sure and report back your results.