Sporadic upload packet loss throughout the day

First. Please try starting here if you wish;

https://forums.xfinity.com/conversations/your-home-network/connection-troubleshooting-tips/602da777c5375f08cdea3db9 

@Hesitancy9530 

I understand how important your services are to you as they are to me as I also to work from home full time and any service issues will cause a headache not only to not be able to assist my customers but prevents my kids from getting school work done and being entertained while I am working! 

I want to make sure we are respecting your time and not repeat the steps you have taken previously. What troubleshooting steps have you taken? 

I also wanted to make sure you are aware that any time you need to troubleshoot our Xfinity app can assist you step by step. It is not just to pay your bill or to get notifications about interruptions. To learn how to troubleshoot in the future you can follow the link: https://www.xfinity.com/support/articles/using-xfinity-app. Honestly, it is the best app to date that we offer and super easy to use for all of your account needs!

I also to mention to please remember, the best communities have most conversations happening in the public boards. This helps to ensure that our users get the fastest most accurate response possible provided by other user or our Official Employees. This also serves to benefit other users who may have a similar question. When interacting with an employee we will always try to keep as much of the conversation in that public thread but know we may ask you for a private message if we need to discuss your account-specific details. To help maintain our forum design, we ask that you never send unsolicited/unwanted private messages to any employee or user in these forums unless specifically asked to do so. 

@Hesitancy9530 

Did any of those tips at that link apply ?

Hi EG. Yes, I've looked and tried the tips mentioned at the link you provided, and I haven't as dramatic of upstream packet loss as before yet. That being said, I still get occasional upload packet loss, and alongside having sporadic high upload jitter (10-20 ms) whenever constantly sending a stream of packets.

Pinging my router shows times in a range from <1ms to 2ms, with a vast majority of them being between 0-1ms.

Pinging various public-facing IPs (e.g. 155.133.253.38 is a server controlled by Valve Software) currently gives back values that vary by 1-3ms on average (pings from 46-49ms), but occasionally (1 in 5 pings) spikes in RTT up by 9-10 ms (spikes to 55ms)
Pinging a Cloudflare endpoint (2606:4700:3037::ac43:c1f1) currently gives back pings between 10-15ms with occasional spikes to 20ms and 1 out of 300 pings taking 156ms.

Here is also a current snapshot of my connection levels reported by the gateway:

Downstream

Upstream

While these are current values, I'd like to add that I noticed within the past several hours that some downstream power signals hit 10-10.2 dBmV, and some upstream power signals went as low as 33.3-33.8 dBmV. I am unsure whether the upstream SNR is being reported or if it's located elsewhere.

@XfinityRichard 

Please circle back here and post any possible solutions for the issue here in these open public forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.