AvatarJointUpgrade removes extra accessory parts

Bug Reports Engine Bugs
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1

When AvatarJointUpgrade is enabled, custom accessories with multiple parts do not work correctly. Any parts welded to the accessory’s Handle are removed, leaving only the Handle.

Steps to reproduce:

  1. Create an accessory with a Handle and another Part/MeshPart.
  2. Weld the extra part to the Handle.
  3. Enable AvatarJointUpgrade.
  4. Equip/use the accessory.

Expected:
The Handle and all welded parts remain attached and functional.

Actual:
The extra parts are removed and only the Handle remains.

Additional info:
This works correctly when AvatarJointUpgrade is disabled. This affects custom multi-part accessories such as watches.

With AvatarJointUpgrade:

image
image244×106 4.54 KB

Without AvatarJointUpgrade:
image
image231×148 5.7 KB

Test File: Accessory Test.rbxl (65.3 KB)