When we merge a ticket it enters a closed state. If a client then uses messenger through a Teams Group chat to respond to the merged ticket, the response is not entered in to the parent ticket or the merged ticket. This leads to users thinking they have responded but our team has no idea that it has happened.
If the user were to email the merged ticket it would be rolled up into the parent ticket. We would really like to see this being resolved. my suggestion is either write to the parent or have the Teams group chat change to the Parent ticket