Cactus doesn't load properly in creative inventory

What I expected to happen was...:
I expected the cactus to load in properly in the creative inventory when i hover over it.

What actually happened was...:
The cactus became weird. it had a grey border in het middle of it.

Steps to Reproduce:
1. Hover over a cactus in the creative inv (or the block next to it) (in the decoration menu)
2. It had a grey border (only when hovering over)
3. ...