Basically, even after the fix of the anormal transparency of Stained Glass while dropped as an item and in the "Inventory Bar", the item SOMETIMES (see pics) still appear transparent in the inventory itself;

Short Version: Stained Glass sometimes still looks transparent in the inventory.

Obs. 1: The "White Spot" in the inventory is where the mouse is.
Obs. 2: In the fourth image, the glasses are being held, but the mouse is invisible.
Obs. 3: The glasses look transparent depending on where the mouse is in the inventory.