Have to say you will need to live with it until you get back to your home dealer, unless you can get it to act up when they are right there. Is it doing it only on the first start of the day? If so leave it over night and go back in the morning. Have the service manager and mechanic at the vehicle with their scan tool plugged in to see if it will act up.
We had a guy at the plant going through the same thing and the dealership hooked the scanner to the vehicle and told him to come back after it acted up. The scan tool can capture the condition and show them what is going on. This maybe the only way to get it repaired.
Don