Item hold by a model are ignoring the pivot and rotation attributes.

Build Version: 577908 & 584788

Summary:
Models for mobs able to hold items have a section in their model called "rightItem". The pivot and rotation attributes of that section usually allow one to change the way the item is displayed on the mob model. In the most recent build changing values of pivot and rotation does not impact the way the item is displayed anymore.
This has happened between build versions with no change in json. The item has a correct rotation in 566145, but using the same template in starting from Build 577908 the rotation is not applied anymore.
Impact:
This breaks a position of a item in one of our maps we have submitted. We have no way around this issue.
Repro Steps:
1. Load template given in the mco_noxcrew slack chat.
2. Look at the model in build 566145
3. Look at the model in build 577908
Talk with @skyao in the mco_noxcrew chat on slack for more information

Observed results:
A Item hold by a model are ignoring or using default pivot and rotation attributes.
Expected results:
Item hold position by an entity are pivoted and rotated according to values stated in the model, if none are stated then it uses the default values
Screenshots/videos attached:
See MCO_Noxcrew slack for files