Wait a minute though. you meant to send $0.20 out of a bitcoin wallet that had almost $48,000 in it? why would someone do something like that? it seems like what you forgot to include a change address somehow. sparrow wallet must have messed up.
I don't really understand it either, he says he has several years of experience in bitcoin. Unless he was spamming the mempool and didn't say so.
Based on the transactions history of the address you sent the coins to, It seems you are always following some kind of pattern.
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I don’t know why but it seems there is a kind of pattern: you usually send exactly 330 sats (which happens to be the dust amount for taproot transactions) to that address and the change goes back to the sending address.
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edit: I believe this has something to do with Ordinals.
...it seems like what you forgot to include a change address somehow. sparrow wallet must have messed up.
And he had done this type of operation more than once, as khaled0111 says, so I'm more inclined to think it was a hack or an error that made the $600 fee limit disappear.
Normally the change address is created automatically, at least in the wallets I use.