Volvo XC60 Internet(LTE) / GPS problem

Good day, I got a new Volvo XC60 here. For 4 weeks I have got it now and sometimes I have the problem that the Internet / GPS only works about a minute after the engine start or usually only after about 7 minutes. This is quite annoying if you want to go and the navigation does not work accordingly and you can get your phone out with a 70k car first. The workshop has already read out the control unit and found nothing. An update w urde also performed that unfortunately did not do anything. Problem is also difficult to recreate because it sometimes works for days and then it goes for a whole day with every restart only after a few minutes. Does someone still have such a problem here and maybe knows what it is so that I could tell the workshop?