If your Instant Loan was in default because it was at least 70 days overdue and you had enough money in your Chime checking account, funds may have been used to pay off the full loan balance*.
This can feel unexpected, but it only happens after Chime sends you a default and right to cure notice and gives you 20 days to pay on your own. This one-time repayment is meant to help avoid a charge-off, which can negatively impact your credit for years.
*Loans are made by The Bancorp Bank, N.A., which may exercise its right of offset to collect payment in default situations.