I have the Caseta Dimmer (PD-6WCL) with the Pico remote.
So the situation is this. When i turn on the dimmable LED lights using the Caseta dimmer (pressing the on button) the lights will flash. But if I use the Pico remote they turn right on and they do no flash.
Also if I turn on the lights using the dimmer buttons on the Caseta dimmer they will turn on and not flash.
In conclusion they they only flash if I press the "on" button on the Caseta dimmer.