To recreate: 1 - Place a hold for a patron, and check in an item and confirm 2 - Go to patron details - holds tab - check the box next to the waiting hold and click 'Suspend selected' 3 - Get a model, click 'Suspend' 4 - Nothing happened 5 - Check the console (F12) 6 - You can view the 400 response and see the response has error "Found hold cannot be suspended. Status=W" 7 - That user is not displayed to user, nor is the modal removed