Hey there, this issue has been reported to the team and they're looking into it. Unfortunately I don't any other updates at the moment.
Please report once again to the team.
Any modification to "EquipmentTypes.lsx" is being ignored
To make shields visible during roaming, it was by modifying a single entry in EquipmentTypes.lsx to make shield attached to a SheathedShield bone.
For cutscenes it was removing the "HiddenDuringCinematic()" attributes on the shield entries in the Armor stats file.
Any modification to EquipmentTypes.lsx is completely ignored ; you can enter weird stuff or even break the syntax and nothing happens. This is clearly a bug or something, this is breaking any mod that edit this file

The last patch didn't change anything, sadly.