I chose to put $5k of personal income tax refund into iBond, but IRS deposited the full refund amount in my bank.

Hi, I E-filed my 2021 personal income tax with TurboTax and chose to use $5k of the refund for purchasing iBond. Yesterday IRS deposited the full refund amount in my bank, without deducting the $5k. Is this normal? Did IRS ignore my iBond purchase selection? Thanks for your help!