This bug report is a parity issue with Java.

Summary:
Placing several glow lichen and sculk vein in one block gives a hitbox like a full block. This is not consistent with java version where the hitbox is as thin as a single placed glowing lichen and sculk vein.

Steps to reproduce:

1. Take a glow lichen and sculk vein.
2. Place several in one block (for example in a corner).
3. Hover over them.

Observed results:
The hitbox will be a complete block.

Expected results:
There will be a neat thin hitbox like in the Java version or like one glow lichen and sculk vein.

Note:
The selection in the Java version is as if it were one block. And also if the lichen is on one side and on the other, then both sides are highlighted when selected.

Image:
Java

Bedrock