I see from your 3am drop, from then onwards you seem to have a lot of jitter and continuous yellow and blue, maybe a drop and reconnect would get rid of that
It would, but at the cost of around 5Mbps sync speed
It's normal behaviour here after a power cut- I use an HG612 and apparently they're quicker than most modems to acquire sync. So when the power comes back up after a power cut the line is fairly quiet for a while and the DLM gives me about 70Mbps. When everyone else's modems get themselves organised there's more crosstalk and the jitter increases, but not by enough to upset the DLM.
It can stay that way for anything from days to weeks (until something happens to cause a normal re-sync for any reason), then it's back to the usual mid-60s sync with virtually zero jitter. The jitter doesn't bother me (I don't do gaming) and the extra speed is nice while it lasts, so I leave it to its own devices
(For quite a few years the local leccy board has had a lot of problems with an intermittent fault on the supply from the local substation, so I've had a fair bit of experience with how everything behaves when power is restored!)