Imagine, that there is some tension inside the extruder, and the filament starts leaking as the the temperature goes up.
For example at the end of the auto bed leveling, the extruder moves to the 1st point of the Brim, passing over the layers of the printable. The leaking filament damages the 1st layer.
Now I realize that it is even not solved by a Skirt., hops... Maybe I need to add some start up G code to move sideways to the 0,0 and draw a side line there (I have seen it in an other slicers).
Or maybe if there is some filament roll on the nozzle output like her