When you pick up an item in creative mode, and your hotbar is full, the item disappears from your inventory. However the items appear again once you open another countainer (ex. Chest)
To replicate glitch:
1 - In creative, with no free space in your hotbar, open any item tab and throw some items to the ground close to you.
2 - Pick those items up.(don't leave the tab screen)
3 - Now open your survival tab, the items you just picked up will refuse to display.
This glitch exists since 1.6, as far as I can tell.
Linked issues
Comments 4
Maybe I didn't specify. When you open your survival tab, the items don't show up on it. The items you just picked up, before you had opened it.
Edit: Description has been updated.
Works as intended.
You can still access the items by opening the "Survival inventory" tab in your inventory.