Block Explorer Game https://www.instapaper.com/p/16800477 So, when there is a large number of transactions within the mempool and also you compensated a comparatively small transaction cost, your transaction can keep on being unconfirmed for an extended time frame due to the fact miners/validators will find transactions with higher charges very first. https://kingslists.com/story21938753/blockchain-explorer-mempool-top-explorer-blockchain-ethereum-secrets-https-cutt-ly-3rj9ygbc