This bug report is a parity issue with Java.

Summary:

The blocks below cannot be placed on the moss block in bedrock but can be placed on java.

Affected blocks:

• Ladder
• Vine
• Twisting vines
• Weeping Vines
• Fire
• Nether sprouts

Steps to reproduce:

1. Place the moss block.
2. Try to put the above blocks on it.

Observed results:

You cannot put the above blocks.

Expected results:

The blocks will be installed as in Java.

Image: