Ive been having the same problem and have had it at 2 dealers and it’s been in 4 times. No one can figure it out. The transmission guy doesn’t think it is the tranny and the engine guy doesn’t think it’s the engine. Watching the rpm’s, they drop off leading me to think it is fuel delivery issue.I've had problems with my 2022 Echo-diesel. it was bucking, especially taking off and accelerating. Only for a second or so, 2 or 3 times. They couldn't replicate it so i took the mechanic for a ride.. within a quarter mile it did it twice. he just looked at me and said "Oh MY, that isn't good". he did some tests and thought it was the throttle body, reprogramed it and i took it out of the lot and a couple of hundred yards down the road, it did it again, Throttle body readings were - 20 and -18 he said. They opened a Star case on it. They had it all week. RAM wants him to test another vehicle with the same engine and see what the throttle body readings are on that truck. he was supposed to check the other truck, in another dealers lot today. I should know Monday what they want to do. i brought the truck home for the weekend. hope they figure it out.
Did your dealer come up with any answers?