Experience disappeared!

When i start a new world there isn't any experience bar, as seen in the first screen. When i set the creative gamemode and i take the Bottle of Enchanting the experience bar appears BUT it's... blue? (as seen in the second screen) When i drop the Bottle of Enchanting the experience bar magically becomes green. I think this is a bug :3

Steps to Reproduce:
1. Start a new world in survival
2. Set the gamemode in creative
3. Take the Bottle of Enchanting
4. Throw some Bottles of Enchanting
5. Drop the Bottle of Enchanting