When you want to take away the chest from a lama, it is not possibl. The only way to recover it is by killing her.
Comments 3
I can confirm that this is an issue. Once you've attached a chest to a llama, you cannot retrieve it unless you kill it. This could be intentional, however, that isn't my decision to make.
Thank you for your report!
However, this is a feature request, so I'll be resolving it as Invalid.
It was never said that it would be retrievable, it's similar to chests on donkeys and mules or saddles on pigs and striders.
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This is intentional. It is not a bug, sadly.