Pointers hit out

Hi, with my 1.8 focus year 98 I have been observing the following phenomenon for about 3 weeks: When I start the car every now and then the hands of the speedometer once completely off, then 2 sec stand and go back to the normal position. (i.e. only immediately after the start) then everything works perfectly. To my knowledge, this pointer rash can be done manually by holding the reset button from the speedometer and turning on the ignition. But why does this come to me? automatic? That’s never been like this.