As I said, it's clearly been tampered with.

[Also, man, Byleth was secretly relieved that it hadn't just been him being totally incompetent. He stepped up beside Eren, cupping his chin in thought as he studied The Claw - his nemesis.]

That or... they intentionally made the claw utterly inadequate for its purpose. It seems to lack any proper grip strength, and these toys have quite sleek fur.

[In short: a combination that'll ensure most attempts would fail.]