Starground v0.8.1.1 was released on August 31, 2024 as a stable hotfix in the Early Access v0.8 update series.

Fixes

• Corrected a problem where Research was still unlocked when loading in a new world from an end-game world
• Corrected a problem where you couldn't assign items to the hotbar

Official announcement

https://steamcommunity.com/games/2793380/announcements/detail/4608958677455444603