Why would anyone need new brake calipers at <50,000 miles?
Answer: Dodge.
Take it back where the work was done. It needs doing again.
And stop riding your brakes!
Would that cause the rubbing effect? The calipers, I mean?
I don’t ride my brakes at all.
Going out to check mileage of when caliper work was done.
Ditto. Take it back to where the work was done. Brake pads can chatter if they are installed without the anti-chatter spring tensioners. Leastwise they should be able to find out what’s wrong. Does it do it over bumps? Does it change while braking?