In some cases, it takes time to approve transactions in the blockchain. Some transactions may take a couple of days to complete them.
Deposit times vary based on the blockchain conditions of the coin such as depending on the network speed and the number of confirmations required.
Regardless of the volume of cryptocurrencies which you withdraw, it will take time for approval and cannot be guaranteed instant withdrawals from your Bauhinia account.
Withdrawals can take up to 12 hours.