Issue
A custom avatar item, animation, or attachment becomes misaligned after newer joint behavior rolls out.
Cause
The asset depends on exact legacy joint offsets instead of correct attachments and current avatar validation.
Fix
Test the asset against current avatar joint behavior, verify attachment names and orientations, and remove scripts that overwrite Motor6D transforms every frame without preserving animation state. Keep a test matrix of body scales and avatar types.
Verify
Inspect idle, movement, emotes, layered clothing, and accessories across the supported avatar range.
Official Roblox Avatar Joint Upgrade recap
#1
Original Heliotrope guidance with authoritative Roblox sources.