Named baby slimes, sulfur cubes and baby sheep despawn

Any baby slimes I name tag vanish after sometime. This effects more than only slimes, and it’s on 26.3, and some of it’s snapshots too. I have seen this happen with sulfur cubes, and baby sheep. The issue can be reproduced by naming one, and leaving it in a empty boxed cage where it cannot die or wander off, and it will be gone later. Expected result is they dont despawn. Instead they despawn.