MG ZS 1.0 Exclusive Auto 5dr

GOOD BUT PROBLEM AUTOMATIC BOX

I own a 2019 M.G. Z.S Exclusive auto. I have a problem with the car going into sixth gear ,unless you take your foot of the accelerator. If you drive the car it changes from 1st to 5th by its self, but does not go into 6th even at 70 mph. UNTILL YOU TAKE OUR FOOT OFF THE ACCELERATOR You can tell it has changed to 6th because the revs drop by 500 rpm and stay there when you put your foot back on to the accelerator.
The car has been back to the dealership twice and they have contacted M.G and were told to do 2 computer upgrades but this has not cured the problem. M.G. are now saying this is how the car is built. But if there is not a problem, why tell the dealership to do 2 computer upgrades.
Has any one else had this problem or perhaps you don't realise your car s not going into 6th.Try taking you foot off the accelerator at 70mph and see if the revs drop. Is there anyone else who has this problem or can help me get this cured.
Den..

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