Around the corners of the of furnace minecart, spawner minecart, TNT minecart, and chest minecart, there are areas of Z-fighting.
Also affects hopper minecarts but that is MC-192678.
Also affects command block minecarts but that isĀ MC-190782.
MC-190782 Minecart with Command Block contains Z-Fighting
MC-192678 Minecart with Hopper Z-Fighting