The light block icons do not show when holding the light block item, they can still only be broken and placed with the item. However, the icon does not show when holding the light block item, they are shown when holding the barrier block item though.

Steps to Reproduce

1. Place down a light block in the world
2. Hold the item in your hand

Expected outcome
Light block icons should appear where you placed the light block.

Actual outcome
Light block icons are not displayed, only when you hold the barrier block item.