Given that this is happening in two Libraries we know the Library is okay amd now we need to look at the OS and the application.
What hardware is connected to your Mac? Disk? Scanners, Printers, Card Readers, multi-putpose machines?
Disconnect them and see does the problem recur.
If it's still happening: a final test:
Create a new account (systempreferences -> accounts) and see if the problem is repeated there. If it is, then a re-install of the app might be indicated. If it's not, then it's likely the app is okay and the problem is something in the main account.
Regards
TD