Hey Mojang!
So there has been a bug in the game since axolotls were introduced and I thought it would be fixed with the newest hotfix but it was not so I decided I would report it. When holding a bucket and trying to pick up the axolotl, often times it will be picked up and simultaneously released again. to pick up an axolotl you have to be at the perfect distance and angle for it to actually stay in the bucket.
Thank you for the update I love it!