Uncompressed lightmaps in HTML5 build do not render correctly [4.7.3]

Hello PerWikman -

We are currently investigating the cause of the issue, so I currently have no information as to the root cause as of yet. While I cannot confirm the exact time for a fix it looks currently like we are shooting for a fix released with 4.8, again that is tentative but considering the nature of this bug probably most likely.

Thank You

Eric Ketchum