Pick an axolotl gives an axolotl bucket instead of a spawn egg

Summary:
Pick an axolotl gives an axolotl bucket instead of a spawn egg. This does not correspond to any other mob and may be related to MCPE-156665.

Steps to reproduce:

1. Summon an axolotl.

2. Pick an axolotl.

Observed results:
Pick an axolotl gives an axolotl bucket.

Expected results:
Pick an axolotl gives an axolotl spawn egg.

Video: