My 23' Laramie does this randomly once in a while. If I have the Adaptive cruise engaged it will let off the throttle, maybe give a quick brake tap, then resume normal function. One section of road on my commute runs along high tension wires for about half a mile, then the wires cross over the road diagonally. Every time I drive under the wires the AEB message comes on, Adaptive cruise will disengage if I'm using it, brake tap, and an "Adaptive Cruise unavailable, wipe front sensor" message with a nifty little animation of a Ram truck driving across the cluster. When this happens, it lasts for about 30 seconds before going back to normal.
Awesome thing is, this condition is easily repeatable & this section of road is within a half mile of my local CDJR dealer. I'm at 21,000mi. now, and will be out of bumper to bumper in the next 4-5months. This is on my nitpicking list of warranty complains to take care of before it expires, along with the non-canceling left turn signal, inop gauges on the trailer towing page in UC5, & a few more...