This bug report is a parity issue with Java.
Summary:
Walls and fences do not connect to the moss block.
Steps to reproduce:
Place the moss block.
Place a wall and a fence next to it.
Observed results:
Blocks are not connected.
Expected results:
The blocks will connect.
Image:
Java
[media]Bedrock
[media]
This seems to occur because moss blocks have been added in such a way that they're some sort of non full block, while retaining some of its behaviors as one.