X5 problem

I have recently ( one week ago) bought the x5 camera and from the first time of using it I have noticed that when the camera is powered on after being off for sometime the touchscreen does not respond to any commands /swipes for at least 30seconds and sometimes longer. After this interval the touchscreen begins to respond ok and if the camera is then powered off but re powered on soon after all is still ok.

The problem occurs only after the camera has been turned off for sometime ( maybe an hour or more ).

The camera has not been used under water and has not been damaged/dropped and has behaved like this right from being delivered to me new

What could be the problem?