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The upstream power is approaching the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, and speed and latency problems.
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
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@DOCEDOC123 wrote:
Do the upstream power levels (updated below) still seem high?
Looks good. Good luck !
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Hello, All. I have not heard back from you. If you still need assistance, please feel free to start a new thread.
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You told me via PM's that you were in contact with Comcast Michael concerning this. Try PM'ing him again about it. If you can't get in touch with him I will re -escalate the issue.
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Thanks for providing the tech visit detail, DOCEDOC123. Please monitor the performance of your internet and report back and continued issues. We're here to confirm the issue is mitigated.
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Glad to hear that things are working so well, DOCEDOC123. Thanks for providing a public update here. Let us know if you end up needing any additional support.
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@DOCEDOC123 wrote:
And thanks to @EG who started me on the path with a terrific troubleshooting approach.
Quite welcome ! 
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