Qubic Blockchain Explorer https://www.demilked.com/author/fourniermay5/ So, if there is a large number of transactions in the mempool and also you compensated a relatively small transaction payment, your transaction can continue being unconfirmed for an prolonged time period due to the fact miners/validators will choose transactions with larger service fees first. In https://bookmarkingalpha.com/story20193644/blockchain-explorer-mempool-the-basic-principles-of-blockchain-explorer-tron-https-cutt-ly-3rj9ygbc