We updated from 2019.4.20 to 2019.4.25. Now all our cloth on character equipment crashes. If I go and edit a prefab in text mode to disable the Cloth component, I get this in the Editor; Code (CSharp): IndexOutOfRangeException: Index was outside the bounds of the array. UnityEditor.ClothInspector.InitSelfAndInterCollisionSelection () (at <d4ac95dcd11e4742ab912a6127ca6eb7>:0) UnityEditor.ClothInspector.InitInspector () (at <d4ac95dcd11e4742ab912a6127ca6eb7>:0) UnityEditor.ClothInspector.OnEnable () (at <d4ac95dcd11e4742ab912a6127ca6eb7>:0) Here's the crash callstack Code (CSharp): 0x00007FF6A8A86CFA (Unity) DeformSkinnedMesh 0x00007FF6A9A2CA31 (Unity) Unity::Cloth::Create 0x00007FF6A9A2BF3A (Unity) Unity::Cloth::AwakeFromLoad 0x00007FF6A7843676 (Unity) AwakeFromLoadQueue::InvokePersistentManagerAwake 0x00007FF6A7844140 (Unity) AwakeFromLoadQueue::PersistentManagerAwakeFromLoad Anybody else has experienced this? EDIT: We found out Cloth now crashes if the SkinnedMeshRenderer has NULL bones. Since we have equipement we put on players, we use the player's bones. Looks like now having NULL bones in a prefab is bad.