There are changes to the Libby app for holds. Instead of a hold title being automatically checked out, you now have choices. You can:

•      Borrow it and start reading! You’ll have a 3-day pickup period to open the Libby app and check out your title.
•       If you’re not ready to start reading, suspend the hold for a set time period. Once that time period is over, you’ll be next on the list.

If you forget to borrow your available title during the pickup window, your hold will be automatically suspended for 7 days as a one-time courtesy on that hold. Once the book is available again, you’ll get another notification that you can borrow it, or choose to suspend it again.

Take a look at OverDrive's help page for more information on this change.