2023 Nissan Titan

I currently have a 2023 Nissan Titan Pro-4X 4WD that intermittently when slowing to a stop between the speeds of 0-7mph it will, at times, feel as though the transmission is dropping from 3rd gear to 1st gear without cycling into 2nd gear properly creating almost a bumping effect to where it feels like you are almost being bumped from behind. Like being rear-ended at a very slow speed. There is a difference in slowing to a stop and it cycles properly which this truck will do the majority of the time and then when it does this hard skipping of the gear and feeling like it is being bumped. I have taken it to the dealership on numerous occasions and reported the concern and let them know that it feels that on the occasions that it shifts hard into that bump it will move forward a bit and that I do not feel comfortable that it may not be an issue with the brakes as well. The dealership has not been able to replicate it to the extent that we are reporting it because it can be so intermittent, and you would need to drive it a bit see when it happens that they keep telling us that they cannot replicate it and it is fine. They had a Nissan engineer come take a look and he could not replicate the exact "bump" feel so he said it is normal and said go ahead and drive it. I have had others in the vehicle, a salesman at the dealership, and others that have driven trucks before, and I have had numerous Titans prior to this one and none have ever done this and other say the same thing that this is an issue and likely with the transmission. I reached out to another mechanic, and he stated that it sounds like it definitely could be an issue that needs to be looked at and could cause a safety risk to myself or others if something happens and does not allow the vehicle to properly slow down or shift into gear properly. The dealership continues to tell me that since they cannot replicate the issue to just drive it. I have towing off.