Naming error

What I expected to happen was...:
White Stained Glass Pane would be named "White Stained Glass Pane".

What actually happened was...:
White Stained Glass Pane is named "White Stained Glass Pane Pane".
Word "pane" is repeated. I'm not sure if it's intentional or not.

Steps to Reproduce:
1. Have White stained glass panes in your inventory
2. They should be named "White stained glass pane pane"