Using the following blockstate json in a custom resource pack:

{
	"variants": {
		"": [{
				"model": "minecraft:block/cobblestone"
			},
			{
				"model": "minecraft:block/cobblestone",
				"x": 90,
				"y": 90,
				"z": 90
			},
			{
				"model": "minecraft:block/cobblestone",
				"x": 180,
				"y": 180,
				"z": 180
			},
			{
				"model": "minecraft:block/cobblestone",
				"x": 270,
				"y": 270,
				"z": 270
			}
		]
	}
}

and a texture for cobblestone that gives it an arrow facing upwards, I would have expected to see lots of arrows facing in 4 different directions.

• Rotations on the x axis do not show the 90 or 270 degrees rotation (pointing left and right in the image x axis example).

• Rotations on the y axis do not show the 270 degrees rotation (pointing left in the image y axis example).

• Rotations on the z axis do not show the 90 degrees rotation (pointing left on the image z axis example).

If you want to reproduce this bug for yourself, I have attatched the resource pack I was using for the screenshots. I was not using any other resource packs to produce this bug.