Details
Description
Once you have added a tag to a case, there is no way of getting back to the state with no tags (the last tag always stays, even when you try to delete it). Bug is reproducible in the Sandbox version.
The Apache log gives the following warning:
mod_fcgid: stderr: PHP Notice: Undefined index: taglist in /var/www/vhosts/domainname/httpdocs/administrator/components/com_civicrm/civicrm/CRM/Case/Page/AJAX.php on line 47, referer: https://domainname/administrator/?option=com_civicrm&task=civicrm/contact/view/case&reset=1&id=225&cid=7677&action=view&context=search&selectedChild=case&key=.........