I have recently encountered an issue where if you use the Bucket of Axolotl, in just a few frames, you can see the pink variant of the axolotl before returning to the color you caught it in.

Steps to Replicate:

1:Catch a Axolotl in a water bucket that is not the pink (most common) variant

2:Place down the Axolotl and it should (in just a few frames) be the pink variant before returning to the variant you caught it in.