Semi-transparent status effect textures do not render correctly in the inventory or beacon UI

The bug

When a status effect texture contains semi-transparent pixels, they are displayed correctly in the HUD, but in the inventory, semi-transparency doesn't seem to work.

To reproduce

Use the attached

resource pack and give yourself the glowing or bad omen (but in that case the bug is less visible) effect. The icon will display correctly in the HUD, but not in the inventory screen.