I was messing around with the latest 1.18 forge package (valkyrienskies-118-forge-2.1.0-alpha1+fe4d606020.jar) because I noticed it was on there and I wanted to check compatibility with my mod pack.
upon messing around with it I found that rubidium had lost compatibility and was making it so the top texture of the blocks were not rendering as seen in the image.
I know the image contains other mods but I made absolutely sure it was rubidium.
I also know this is still an unreleased version I just wanted to make sure this was known.

Don't make issues for unreleased versions, if you want to report issues with unreleased versions do it on discord thru the playtesters channel thank you