I got my 2019 +4 110 back in January, with the GDI engine.
I have to say that I didn’t encounter a flat spot, then engine was overall “tight” for the first couple of hundred miles (although brakes that needed bedding in were a more significant issue!)
Like others have said, I think it would be a trip back to your “local” dealer.
I wonder whether there is a “delivery” setting that should get changed at pdi but was overlooked?
Hope you get it sorted, and can fall back in love with the Morgan. I bought mine under similar circumstances so understand the emotional attachment and desire for everything to be “just so”