I've had good luck putting a 1uf 50v NP cap across the couplers for random opening.
Also, remember that sometimes coupler openings are a mechanical issue, first test is to unplug the coupler from the electronics and see if it still opens during use.
I have installed probably a dozen Cruise Commanders, and I don't have issues with the couplers after adding the cap on any of them. A couple required replacement for obvious mechanical issues.