Transmission Slip Out Of Gear problems of the 2017 Nissan Titan

Sometimes when starting from stop, the transmission will not shift out of first gear. I have to manually shift into neutral and then back into drive while the truck is in motion. This is dangerous when pulling out into traffic because after 20-25 mph, the truck stops accelerating until I manually put the truck into drive. It usually takes me a second or two to notice that I'm no longer accelerating and to fix the problem by manually shifting into drive. Meanwhile traffic is rapidly approaching. The oncoming traffic has to slow down. Sometimes the approaching traffic will honk because I'm an unexpected obstacle to them. I've talked to several other Nissan Titan owners who have had similar experiences. It's difficult for me to judge the frequency, but I'd guess this occurs several times per month. This had occurred since I've owned the vehicle. I've taken the vehicle to the local dealer several times they have been unable to resolve the problem.