Following are the list of issues / enhancements addressed in this hotfix ( 8004 ) release.
Issues fixed in 8004
SD-34474 : When a requester replies to a request through Self Service Portal and if the notification is enabled for the technician, then the description sent in the notification is that of the original request and not the latest conversation.
Enhancement in 8004
SDF-34487 : Option to filter assets based on the sites when selecting an asset for a incident / service request.
Please refer to the below link for the steps to install the patch.