Large Update File for Halo 5: Forge

There’s currently an 18.10 GB update being downloaded on all my W10 machines and I can’t find any Patch Notes anywhere for H5F? Some people say it’s for two small gameplay fixes but I doubt it’ll take that much data to fix such small issue, can someone please link or tell me the Patch Notes for H5F?

HALO 5 HOT FIX - JUNE 20TH
I suspect the windows store version is packaged in a way that requires the whole app to be redownloaded.