I just started to prep the Lightning for the weekend, and my retract system fails to sequence. I have dual valves and a sequencer. Turning the receiver switch on and off activates the red led light about half the time. I have the function set correctly, because I can plug a standard servo into the rx and all functions are normal. I have 4 flights on the setup without any issues. Could the sequencer be defective.

Anyone else ever experience this problem???