Stupid article, can't they write why the coins can't be spent?
edit: I found the reason somewhere else.
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So when you're sending Bitcoin to a Bech32 address, you need to make sure you're sending it from a type of address type that knows how to pack the information correctly. Otherwise it arrives in the Bech32 address without the information needed to be transferred again.
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I read the above and still don't get the problem. What type of address was needed before sending to Bech32 and why was it unspendable? And how can it be unspendable if it is sent back to the company's wallet and thus "proves" it's an inside job?