Locker Problems After 5.13 Install

Has anyone had problems with their rear locker after installing 5.13 gears?
My locker was installed by a "professional shop" and seems to cycle OK
(On / Off) when the Jeep is suspended on the rack, but has issues (remains locked, etc.) once you lower it onto the ground. The Jeep's only got 4,000 miles on it and all the locker functions worked fine prior to the gear swap.
I also noticed that once the rear axle locked, the Jeep wouldn't come out of
4WD (even with the T-Case lever back in the 2-High position).