Walls and iron bars do not connect, but in Java they do

In Java when you place a wall and a iron bar next to each other they connect, but in Bedrock they won't connect and you can even walk trough the line where they in Java connect. I don't really think this is a bug, but it makes a small difference. The first one is Java and the other one is Bedrock. The walls also have a hole between them in Bedrock.