Looking at the state of pending transactions on Etherscan I noticed two transactions that have a gas price much higher than that of the average network fee, yet they are not being mined. The transaction belong to the following Account
At the time of writing, the asking gas price is ~40GWei, these two transactions offer 220GWei and 550Gwei respectively. Yet they are pending for about an hour.
Is there a reason for a miner not to include these transactions? The address seems quite "fresh" so censorship does not make sense. Is this a bug of Etherscan? It is also strange that both transactions have the same nonce (1)