FYI, after explaining to Cree support that resets are not a solution they have agreed to refund the purchase price. My Cree bulbs are on their way to Cree via prepaid FedEx as I type.
I’m actually impressed Cree agreed to the refund but it is the right thing to do as the bulbs can no longer be considered useful with the flashing issue (believed to be the FW crashing and the bulb restarting).
My refund almost covers the cost of the hues/bridge I bought to replace the Crees. And BTW, since pulling the Crees and adding the hues my Iris sensors have been solid too.