The bug
Armor slots in inventory are black in the following cases:
Player is in lava
Player is holding an item with special rendering, such as a banner, a chest, or a bed
This list might be incomplete.
Linked issues
is duplicated by 11
MC-162304
Armour slots Turn Black when banners are held
Resolved
MC-162393
Banners in hotbar affect armor and offhand slots
Resolved
MC-162544
armor slots
Resolved
MC-162583
Armor slots black when hotbar full
Resolved
MC-162603
Armor slots of creative inventory will display black when not held items and player having invisibility state.
Resolved
6 more links
relates to 2
Attachments
Comments 4
Actually, scratch that, I reorganised the tickets, so that we now have three separate tickets about inventory transparency issues.
It also happens if you hold chest, shulkerbox or bed and when player is in the lava.