I am experimenting with JN516x-EK004 Eval Kit. After a bout 60 seconds of no activity using the generic node board buttons to control LED's on the lighting node board, the generic mode board loses it's connectivity to the lightning board. Is this normal? To re-establish communication I have to use the DI08 button and the SW1 button. I tried both BAT and REG modes also. The red jumpers are set to their defaults.