upstream / packet loss issues at night
I've been having an ongoing problem for over two weeks now with what seems to be an upload-only issue. Approximately around 9:30 PM EST (time won't be exact but close usually), in any game I play or if I attempt to live-stream my gameplay on a website called Twitch, I will experience dropped frames / dropped outgoing packets in different applications intermittently. It will happen generally every few minutes or less, and last for about 5-10 seconds, but again the length and severity will vary. I never experience any issues on the download side or while running a speedtest, and to my knowledge, the different levels that show on my modem seem fine.
During the day, I will have LITERALLY zero dropped packets or frames on any of these applications, and again the issue will always begin at roughly 9:30 PM. We have recently installed DirecTV and had a few new people move in who have an additional receiver or two, and DTV set up a splitter (that seems to be working fine?) to manage everything. No one is specifically coming home and using their TV or the wi-fi at these times, and I cannot figure out what is triggering this to happen consistently, but it has been a VERY annoying impact on my usage at night.
I've called into tech support multiple times, and have had 3 technicians come out, with one replacing the co-axial cable and another replacing the combo modem with an Arris TM1602 modem and sagemcom router setup instead. There has been zero changes or improvement in the issue I've been experiencing throughout all these interactions so far with Spectrum, and I now feel it pointless to keep calling them to come out when they seem unable to fix the issue at hand (albeit, it seems a unique one so it's understandable). Unfortunately, no technician can come out during the times that this is happening, so any technician that takes a look will see little to no problem besides some noise issues that the first technician stated they fixed.
We also recently switched from an older Time Warner package of 30 mbps to 100 mbps / 10 mbps upload around the same time that this happened, though I suspect the issue has more to do with the DTV setup in some way combined with the mixture of a few new roommates and few more TV's that may potentially be causing noise issues or problems, though I'm not sure why this issue would occur only at night and not at all times if it was a TV issue of sorts.
Modem Levels - https://gyazo.com/5c8c67a0926b6075bf133fdc1dcb8267
Any help or recommendations at all would be appreciated as I'm really not sure what my next step should be. All levels seem within a normal range besides the upstream being a little low potentially? I'm not sure if an amp of some sort would help balance things out if a somewhat weaker upstream level is causing the potential noise to have an effect, but again I can't figure out why this only happens at specific time frames at night and lasts until the very early morning. Thanks for reading and whoever can help, let me know if you need any additional information. Appreciated.