If you are referring to a specific gameplay scene or asset, it is likely related to the Orc/Oni content Breeding system
The release of v0.4.0.0 introduces several critical updates: Architectural Refinement
ProjectR Ver0.4.0.1 - [チーム]アップルパイ - FANBOX
: We’ve addressed over 20 community-reported issues from the previous v0.3 builds. 🛠 Under the Hood