If the dimmer used is of the CL technology for LED and CFL screw in lamps, then you may need to change to a reverse phase type dimmer compatible with electronic low voltage.
Ex. - Change Diva DV-CL dimmer to a DVELV type.
Some CL type dimmers will operate fine depending on the logistics of a job site while others will cause LED fixtures to react differently while dimming. Please contact Technical Support at 888-387-2212 for further information.