Actually I just did this repair on mine last week.
If anyone has that issue & your RV is out of warranty it's a simple fix.
Each sliding door is secured to the track via a plastic locking clip / lever that holds the track mount into the bracket on top of the sliding door.
Works a bit like a key hole.
I removed both doors and found the small metal retainer that prevents the #2 panel from moving when stowed.
The wood the screw was screwed into was stripped out.
It seems it was over tightened more than once.
It appears perhaps the dealer "fixed" it a few times as well.
This is a small piece of metal ( approx 1/2" x 1 5/8") with only 1 screw to hold it perpendicular to the door panel.
I took a piece of metal 1/8" thick & 1 1/2" x 1 5/8" and drilled two holes in it.
Now the metal bracket is held in place with two screws and the bracket can't fall out of place causing the panel to slam back & forth while driving.
Getting the doors off is easier than reinstalling them.
Reinstalling is a bit of a balancing act but is something anyone can do. ( I balanced the bottom of the door on the top of my foot to get it into position & locked into place)
I certainly wouldn't pay $100 per hour for someone else to hang a sliding door panel.
A little patience is all it takes. You could actually make the bracket with a Dremmel and the metal I made the bracket from was an unused joist hanger.
I'd post pics but my Georgetown is at the dealership getting the leveling jack leak looked at.