I have many SR8's that I am using with my X20S in ACCESS mode. This issue only occurs with 1 of them. Every time I go out to fly this one particular airplane, the receiver is not bound. It is registered and I can bind it again easily. It works fine the rest of the day. The next time I go out to fly, the receiver is not bound. I only use the X20S transmitter and I cannot figure out what could possibly be causing the issue.