Packet loss starting in the evenings the past couple weeks

Hi all,

I've had really bad packet loss in the evenings that I've noticed while playing video games. Yesterday, I decided to set up a ping plotter test for a few hours. I started the test around midday and played a few games to test for packet loss. Didn't see anything unusual. Later on in the day, I started to get pretty bad packet loss while playing games, and I was also able to capture this in ping plotter.

I just purchased a new modem (Arris SB8200) because I thought maybe my previous modem (Arris SB6183) had gone kaput. Is there anything else I can try on my end? If not, is there anything someone can help me with before I try to schedule a tech to come out?

https://imgur.com/a/Y7S5HJl

I left ping plotter running all night, and packet loss really dropped off after 8 AM, and no packet loss since noon. 

EDIT: I have added two new photos to the album showing a ~30 hour results from ping plotter. One with my router as a target, and one with an online gaming server as the target. This further shows evidence that the packet loss drastically decreases during the daytime hours. It gets worse in the late evening as night starts to fall.

EDIT 2: I have removed the photo showing the modem event log. I don't think there was anything interesting there, and it had my modem's address visible. I can share redacted if anyone is interested.