So I had enabled virtual textures and lightmaps for using the GPU lghtmapper. I no longer use the GPU lightmapper (it was slower than the CPU lightmapper for some reason) and had turned off the virtual texture checkbox, but that left the check box on for virtual lightmap textures even though it was greyed out. So I reenabled virtual textures, and unchecked virtual texture lightmaps and after a restart and shader recompile the lightmap density view works as expected. So my issue is resolved but for anyone running into this it seems to be a bug working with virtual textures.
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