Map marker jumping

I am currently at what appears to be St. Anna Church. The map marker, however, is elsewhere.

Platform: PC
Host/Single Player

Steps to reproduce:
Unknown; I can only say that I have visited St. Anna Church today and did the quest there.

I had this yesterday, too: the marker for Beredskapsförad 119 showed “Bergrum Vargen”, a location slighly north-west of BF 119, where I had been shortly before.

Another case: