Sorry if this is in the wrong section.

I installed a Sunnata PRO LED+ and two Companion ST-RD for a 4-way controlling ceiling can lights in the kitchen. Great setup at first but every afternoon the lights won't stay shut OFF or dimmed, returning to full brightness within a few seconds. Pulling FASS is the only way to shut them off. By 7pm the switches work normally. This happened last summer/fall and then stopped for the winter/spring. I have tried changing the phase, changed breakers, confirmed the wiring, swapped out the PRO switch with a new one, worked with Lutron Customer service, checked connections, confirmed first ST-RD has the 15 amp line and the PRO has the load to the lights. It is like I have gremlins and about to go back to a simple 4-way switch.

Any suggestions?