Inventory Armor bug

Hello.
I recently (yesterday) discovered that there is a little glitch in the Inventory
menu when you have armor partially
That means that if you place an Armorpiece in a slot the slot below turns black or blue . It's a bit weird sometimes it's a bit different I think I even had that with the whole Armor Inventory when I took a bow and wanted to place it somewhere . Here some Photos somewhere where they should be I think .