item command does not update camera_overlay for saddle and body

to reproduce

1. /item replace entity @p saddle with stone[equippable={slot:"saddle",camera_overlay:"block/glass"}]

2. /item replace entity @p armor.body with stone[equippable={slot:"body",camera_overlay:"block/iron_bars"}]

expected result:
the textures of Glass and Iron Bars are overlayed on the camera

actual result:

nothing appears on the hud

additionally:

• if the item is instead given to the player with

/give @p stone[equippable={slot:"body",camera_overlay:"block/poppy"}]

and the player right clicks equipping the item, the overlay is applied correctly

• if the player exits and re-enters the world, the overlay disappears

• if the overlay is applied correctly, using

  item replace entity @p armor.body with air

  does not remove it