I observed that for placemarks near the north pole, their location on a raster maps (texture layer) can change from a projection to another. Let's take for example the Rijpsburg village in Svalbard, Norway (78.3818823, 14.660228). With the mercator projection, it looks ok, the placemarks is on the coast but with the Lambert azimuthal projection the placemark is painted in the sea, 2km south from where it should be.
Should I assume that there is a marble precision issue at the north of the globe when using a raster maps and an azimuthal projection?

Marble virtual globe 2.2.20 - Marble library 21.04

Whenever Marble uses Mercator projection (e.g. for the OpenStreetMap tiles) then the precision will be low as soon as you approach the +/-85° Latitude mark. This is due to the fact that we approximate the exact functions using polynoms for performance reasons.