Axolotl bug report

[SparkleOfTheAether]

So I was raiding an ocean monument with some axolotls. I usually use commands to make my pets invulnerable, but I forgot to with one of them, and when it died, I restored the server to the latest backup. When I logged back on, two of the axolotls were completely gone. I presume this has something to do with the fact that they were in our inventories when we disconnected to restore the server and weren't when the backup was made, but they're also not in the pond where they were when the backup was made.