Items with two texture layers have two enchantment glints

Items with texture overlays, such as potions, spawn eggs, and leather armor, have their enchantment glint applied twice when they are enchanted. A resource pack I applied makes both glints distinguishable. The top row of items in the video has twice as many lines moving across it compared to the bottom row, and sometimes the lines overlap. This applies to blocks too, like the side of the grass block, but does not seem to be the case with leather armor on the player's model.

The resource pack provided is the same one used in the video and in one of the pictures.