Glitched Cauldron item result from Middle click

When i press Middle Click while looking at a cauldron, instead of switching to the cauldron item in my inventory, it puts a new cauldron item in my inventory that uses a flat model of the block texture. (block texture item does not stack with regular item, both are named "Cauldron" and the glitched one appears to only have a texture glitch, otherwise regular cauldron item)