When you're in creative mode, and pick up an axolotl using a water bucket (how else would you) It works as intended. When you place it it still works normally, but when you fill it back up with water, it take away the source block, but your bucket doesn't fill up. This is really annoying, because you need a full bucket to pick up the axolotl back up.
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I don't know how it got changed to java, because I put it on bedrock. Also the normal bucket doesn't work
DuplicatesΒ MCPE-82206

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We're tracking this issue in MCPE-82206, so this ticket is being resolved and linked as a duplicate.
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-- I am a bot. This action was performed automatically! The ticket was resolved by one of our moderators, and I left this message to give more information to you.
You are playing the Bedrock version of Minecraft. I have requested that this report be moved to the correct project, MCPE.
In the meantime, try with a regular bucket.