Is it a used FLX? CVT shuddering is a sign of fresh oil/fluid being a good idea.

Oops, don't worry you'll soon catch me, well soon enough except I'll be doing a 4,000+ km trip in a few days which will more than double my pathetic effort so far after 9 months.
My left rear door switch only works when it's inclined to, the contact the best, it can be straightened a bit but it meekly bends a bit with use, a design update could be warranted.

Opposite to that, old dirty oil can cause shuddering.
An oddball thing I've noted that has affected another brand of car with CVT is tyre pressure below a fairly reasonable level, I'd hope that doesn't effect us but it seemed a curious issue to note in my mind.