Very weird cruise control behavior
First, the only mod to my 2005 5.4 is a Gryphon. I drive the same route to work every day. It's a country road and I drive it at about 60MPH. 11 miles into the trip is a stop sign at which I make a right hand turn. I use the cruise control without issue up to this point. After the stop and right turn, I accelerate to a little over 30 MPH and then hit the resume button to engage the cruise and bring the truck back to highway speed. The cruise engages and the truck starts to accelerate. After about 4 seconds, the cruise disengages. The dash light goes off and I have to hit resume again. The cruise engages again and I don't have any more problems.
The really weird thing is, this only happens at that specific corner. It's happened 4 times on my way to work and twice on my way home recently. I've used the cruise extensively, including to accelerate up to highway speed from ~30MPH in many other places, and never had an issue. It's like that stop sign and turn out in the country is in the Twilight Zone.... There is a graveyard right there, lol. Anyone have any idea what to check? I'm not hitting the brake. In fact, the last time it happened I had hooked my foot under the brake pedal to pull it up to eliminate that possibility.