Bought 2 new ET remotes for customer. He had 2 Dc blue garage doors. Added first remote ✅ second remote no ways( all remotes were set to old code format solid light) Then first remote to second door✅ Second remote nothing. Picked up another new remote and adding in no problem to all systems including alarm and panic receivers . Returned the “faulty” one to ET for test, no fault found. They gave me a new one and i put it in my box. This week again buy 2 new remotes for again another dc blue garage door different town. Fisrt 1✅ Second one Not. Did master erase and again the same first remote✅Second Not. Grabbed the spare new in my box and ✅ . Came home and tested the refusing remote on loose ET receiver it worked on all buttons. Anybody had this?