Iron bars and glass panes do not connect with any kind of pistons

Summary:
Iron bars and glass panes do not connect with pistons and sticky pistons when you place them down.

Steps to Reproduce:

1. Place a piston.
2. Place an iron bar or glass pane next to the piston.

Observed Results:
The iron bar/glass pane does not connect to the piston.

Expected Results:
The iron bar/glass pane should connect to the piston.