I made an enclosure for my 8 axolotl and half of them have disappeared. The habitat is enclosed within a fence and it has land and water. They were all named. I exited the game and when I came back half of them were gone- 2 gold, 2 leucistic. My brown and cyan ones were still in the enclosure. I saw on r/Minecraft others were having this issue, so I put them into buckets.