Lightmaps are low resolution in build, but not in editor

This is a bug that has been plaguing my project for a while. Here are some examples:

(Editor on the left, build on the right)

Lots of light bleeding, plus disgusting texel density. Any idea what could be causing this? It’s not the quality settings, those are set to maximum and no other textures are downgraded, only lightmaps. It’s also not a texture streaming bug, I turned that off and it still happens.

Figured this out finally, seems to be a texture streaming issue. Disabling texture streaming or raising the memory budget fixes it.