Hi @GOODY and @bowserkb, we understand you would like to remove the “First Response Due” for the tickets which are kept in the bug status. As per the product behavior, every ticket would have a first response and resolution due by targets associated with it. When you change the ticket status to SLA timer ON status (i.e SLA running on tickets), the targets will still be shown on the ticket details page. Now the First response due can be removed either by adding a reply/public note on the ticket. If you do not wish to respond to such cases, you can set the ticket status as SLA timer OFF status and the SLA would no longer run on such tickets, thus removing the targets shown in the details page.
To turn the SLA timer OFF for statuses, you can go to Admin -> Workflow -> Ticket fields -> Status -> Bug -> Toggle off SLA timer.

Post which, The first response due by time would be removed from the ticket.

I hope this helps.