Named baby sheep and sulfur cubes despawn

When I leave any of my named baby sheep, or sulfur cubes in a safe cage on their own, they despawn when I get back. I have tested this various times by repeatedly replacing the baby sheep and getting the same results every time, it despawns. This seems to effect 26.3, a few of it’s snapshots, and this snapshot. The expected result is the name tag keeps them from despawning, and the actual result is they eventually despawn. I have lost 4 sulfur cubes, and 7 sheep. I haven’t seen this happen to any other mob yet.