Odd fuel problem

New problem just started happening. This has happened when the engine has been running for fifteen minutes, and happens almost every morning as well.

I live in the bay area so air temps in the morning have been in the 50's and 60's. I let the engine warm up and wait about 2 minutes before driving.

I have no problems driving on surface streets, or putting a load on the engine getting on the freeway. After I am on the freeway, and cruising for about a half mile, it feels as if I am running out of gas. I then play with the throttle, flooring it, letting back off to part throttle, get some response, it goes like this for half a mile or so, and then the problem goes away, and the car runs great for the rest of the day.

I am running the summit M2008 carburetor
https://www.summitracing.com/parts/sum-m08600vs
Fuel pump and filter are 5 months old, same as the carb.

What do you guys think this could be?