So basically when you try rotating a lightmapped object (color + direction) - lighting artefacts start appearing until rotation is reset to original one, at which lightmap was baked. Same thing was observed with animated objects - seems like it has something to do with how world normals change during rotation / animation, and current directional lightmap shader doesn’t process it correctly (?)
I’ve been observing this issue for quite a long time already (back in 2019), but only recently it started blocking one of my AR / 8th Walls project since I can’t bake any lighting for AR scene because of this rotation issue. Hope it can be resolved soon - or at least would be happy to hear out suggestions how I could fix it myself and make a pull request. Cheers!