When holding a enchanted item (works atleast with bows)/having them in the hotbar, the ui appears to try to apply the enchant_glint.png as an overlay onto itself.
Steps to Reproduce:
1. Excecute /give @p bow 1 0 {ench:[{id:48,lvl:100}]} (That's the command I used, atleast)
2. Don't damage the bow
(3.) Put the bow on your hotbar
4. Notice how the crosshair/hunger and health bar darken to the color of the glint of an enchanted item.
Additional Notes:
In the attached screenshot, you can see that I had a enchanted iron pickaxe and sword on my hotbar aswell, but the pickaxe and the sword weren't causing any problems.
I'm sorry if this is a duplicate, I searched this tracker and didn't find any bug like it.
Damaging the bow causes this bug to no longer happen.
Duplicate of MC-46404 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.