I remember a patch for this a while ago - but can't find it and don't know if I actually remember right. When an alert appears in circulation the focus should not be on the checkin / checkout box anymore. That way if you accidentally scan the next item you don't lose the alert. The focus shouldn't be on the button either because scanning would end up "clicking" the button.
is this still valid?
We now use modals and other ways to block entry of another barcode. Marking FIXED.