This is a minor visual oddity and I’ve only noticed it since Hotfix 6 but when in a vendor screen and I switch between Buy & Sell using RB or LB the icons above the inventory side of the screen for Gear, Consumables, Armor Upgrades and Special Items ‘shift’, as you switch between them.
The don’t seem like they are set to be at the same position on-screen, vertically.
As I say, minor issue.