We have been using custom fields in support tickets for a while now. After applying Version: 5.3.11 we are encountering some problems.
Once we enter the data in the fields and click on the "Save Changes" button is submitted, we get an error titled "Ticket ID Not Found."
Upon closer inspection the URL, it appears that the value of var id is missing which is causing the problem. See example url below (id=)
/https://xxxxxxxxx/admin/supporttickets.php?action=viewticket&id=&sub=savecustomfields
Is anyone else experiencing this?