When a armor with a trim is equipped in and unequipped, and then a armor without trims is equipped, the texture in the inventory for the item will flicker before settling in the texture it would have if the armor trim on the other piece of armor, but doesn’t show on the player.
Steps:
Equip a piece of armor with an armor trim.
Unequip the armor and equip a new piece of armor of the same type.
The item texture will have the same armor trim as the previous armor, ONLY when equipped and does not show on the player’s body.
This issue is being tracked at MCPE-187679.