I agree with Old Fuff.
If it's new why not call and ask to have it inspected under their warranty? No cost to you other than driving to the shipping point.
You can't 'diagnose' a revolver problem online, much as we might wish it could be done. The gun needs to be examined in order to properly determine the cause and required correction.
BTW, if it's a new-style revolver the carry up is checked when there are dummy rounds in the cylinder charge holes. Not with empty charge holes.
The reason is that the new-style extractors are not pinned in place like the old-style extractors. The new-style extractors are partially supported (and the cylinder ratchets held in proper position relative to the hand) when there are cases in the cylinder's charge holes.
When 'timing' (carry-up) is checked it's recommended to use dummy rounds in the cylinder to simulate how the cylinder is going to function when live ammunition is loaded in the charge holes and are supporting the extractor, holding it (and the ratchets) stable. When armorers are taught to cut new extractors they are told to fill the charge holes with dummy rounds so the extractor is fully supported when the cutting arm/hand is used to cut the ratchets.
Also, the DA carry up is checked when the trigger is slowly pulled to the rear until the ball of the cylinder stop engages the stop notch on the cylinder. The cylinder stop should engage the cylinder stop notch before the hammer falls. However, slowly pulling the trigger to the rear doesn't mean doing it s-l-o-o-o-w-w-w-l-l-y.
I'd let S&W examine the gun and check it out. Might be cylinder cramp (rough or inconsistent cylinder rotation on one or more holes). Might be a yoke which isn't properly aligned. Might be the cylinder stop. Might be the extractor. If the trigger 'stacks' in the DA stroke on a charge hole and is slow to reset it can indicate a long ratchet. Might be a couple of things. Let them examine it and figure it out.
FWIW, when folks start using the generic term 'timing' you'll sometimes hear folks recommend installing an over-size hand. (There's more than one over-size hand for each revolver frame size, BTW.) Yes, this can be a way to correct a doesn't carry up issue, but it can also sometimes create a long-ratchet condition ... another problem ... which will have to be repaired. In the long run a new extractor might have to be cut for use with the factory standard hand, anyway.
Let the folks at the factory look at the gun under their warranty.
Just my thoughts.