Got quite a few TC21's that are dropping WiFi connection, and immediately reconnecting back.

Mostly happens when in use, where the user is moving around a warehouse. After a lot of digging through WiFi logs, it appears that the TC21 is very reluctant to switch to an AP that is closer and provides a much better signal.

The WiFi infrastructure is Cisco WLC controlled, and no other clients are having any issues, also the warehouse have been site-surveyed recently.
Only 5GHz radios are enabled.

Is there any settings on the TC21 that can be modified, to make the scanner more willing til shift AP???