Placing some incomplete / transparent blocks on leaves disables "fancy leaves"

Summary:

Placing some incomplete / transparent blocks on leaves disables "fancy leaves".
Works only if leaves are surrounded by full blocks (eg dirt, but wool doesn't fit, for example).

Affected blocks:

• Button

• Bell

• Dragon Egg

• Slabs (MCPE-53731)

• Amethyst Cluster (Amethyst Bud)

• Pointed Dripstone

• Spawner

Steps to reproduce:

1. Turn on the function in the settings "fancy leaves".

2. Place the leaves.

3. Surround the leaves with dirt, except for the top side.

4. Place (in any way / see the picture below) above the upper side of the indicated blocks.

Observed results:

Through the transparent spaces of the blocks at the leaves, you can see how the "fancy leaves" function has been disabled.

Expected results:

When the "fancy leaves" function is on, all leaves will be transparent.

Image: