Again a return of frequent intermittent drops

(Provided link to the last time down at the bottom)

8 months pretty decent and all of sudden the same issue. Everytime a tech comes out they will change some fittings outside at either the pedestal in my backyard or the box on the back of the house and come inside to check but nothing ever needs to be done inside so they leave and it's good for quite a while (7/8 months this time).

Incredibly frustrating but I'm just hoping someone can help brainstorm what it could possibly be. It's hot where I live but it hasn't seemed to match up with the hottest months (seems pr random) so I don't know if something is just melting outside or even slightly that a new cable fitting does the trick for next 6-8 months? The first time they replaced the cable from the pedestal to the box outside and basically same thing some months later the same drops (same in length of downtime and frequency). 

Modem has also been replaced a couple times hasn't seemed to have much of an effect. I recall the first time I had swapped for a new modem hoping that would help but the drops remained identical in nature.

When this starts happening I move the modem near the entry point from the box outside so there's nothing happening along the way as well as removing the splitter so it's a straight line to the outside.

The main point about the fittings outside, I would say, is that it doesn't just solve the problem for a day or two or even just a month it's typically a number of months without a single drop (neighborhood outages aside).

I know I'll get the typical reply and will probably have to have another tech out but I'm hoping someone with deep knowledge of this could maybe have some insight as to why this pattern could possibly seem to occur.

A link to the last time:
https://forums.xfinity.com/conversations/your-home-network/return-of-frequent-intermittent-drops/671ac23e9771310e40776668

Thanks for any help,
Kevin