Internet cuts out every night / morning multiple times between 3-5 AM, like clockwork. And it's getting worse.

A few months back our internet speeds were horrible but the internet never ever went down. I had shown both Xfinity support on twitter a screenshot of our signals taken from the xfinity router settings. Posted it on reddit too while I waited for a response. The signals were beyond bad, with some claiming they were the worst signal levels they've ever seen.

Anyway, A tech eventually came out and fixed a major issue that was on the pole outside. Internet speeds improved drastically and the service has never been faster.

However, ever since this repair, our internet now cuts out the same time every morning. Never happened before.

At first for about a month after the pole repair, the modem would reset every morning 1 time at exactly 4 AM. Over the past few weeks though, the time window this reset occurs has expanded. Now the internet will cut out multiple times, starting now at 3:30 AM & ending at 5 AM. Once 5AM hits, the internet is totally stable. It does this every single night.

I'm an ebay seller and overnights is when I take care of my ebay business. it's crucial I don't lose my connection within this time frame, at least not multiple times everyday. I was working around the initial 4AM reset and making sure I had my stuffed saved before the internet cut out and deleted my listing drafts. But now it's getting unpredictable, again until 5AM rolls around when things become stable. to say this is SUPER frustrating is an understatement.

Some of these resets are abnormally fast too.  Usually a modem reset takes about a 6-8 minutes. Each light slowly returns. That still occurs. But after that reset, there seems to be a series of some other type of resets occurring, where the modem goes from no connection and no light, to 1 light to a full on connection within seconds. Then another slow reset. Repeat until 5AM. It happens 4 or 5 times every-night.

Goes something like this: Internet off, hard reset. internet back 8 minutes later. Off again 5-10 minutes later. No lights on modem, but all lights return within 40-60 seconds or so. a few minutes later another hard reset. back in 8 minutes. Off again 10 minutes later, no lights. 60 seconds later, all lights back on, modem online. This cycle repeats randomly until 5AM.

What IS the deal with this and why did this only start happening AFTER the repair?

Our internet is great now, but something is going on within this specific 3:30-5 am time frame that's causing an issue. Please advise.