Axolotl disappearing!

When i try to take a axolotl with a empty bucket, the axolotl disappears and sometimes the bucket too. I know the right thing to do it's take the mob with the water bucket but i don't think it was supposed to disappear, pls fix the bug. I don't know if it happens on android, ios, xbox, and java edition, but i am sure it does on windows 10 edition.