Can you not use the raw transaction in the first post?
It will get rejected due to another reason: "
too high fees". That includes blockcypher.
He needs the one with the normal fee.
How is it sneaking into any mempools at all?
We can just speculate.
pooya did a good catch since newer
non-SegWit Bitcoin core nodes will reject txns with Witness data in their mempool.
So it must be a forked version of Bitcoin Core or other implementations of Bitcoin.