I confirm that for Unity 2019.3, too. When I bake a lightmap, I use the GPU lightmapper, everything seems to be fine.
But if I restart the editor and change the scene view for example to “Baked Lightmap”, it just shows me the scene with a transparent checker board pattern despite the baked lightmap. Basically no lightmap scene view works, like Texel Validity.
How to inspect that if I do not want to rebake everything?
