You trying to make it up-shift on a hill? wait till the crest of the hill, when you can take the force off the pedals ,
and allow the chain to make that big rise... without so much force pulling on it.


I hope you paid the bike shop adequately for their time.

Bikes direct is a warehouse shipper , they bypass what a bike shop does to prepare a bike to put on the sales floor.

perhaps Its Cable stretch ? could be a 53t FD on your cross style crank with a 46 outer .
somehow people have been racing with that sort of kit for quite a while..