Lag ib sound in earphone of Panasonic HC-WX970

[Bosse_A]

I just got my Panasonic HC-WX870. Among all thing I am testing is to monitor the sound in my earphone. There is a lag in the sound of the earphone, but no lag of sound in the recorded scenes. In my HDC-TM900 there is no such lag. I wonder if this i a normal behavior or a fault.
//Bosse