Found a bug with this. When leaving feedback and the thread is required, it only shows the most recent 30. So if the user(s) are posting lots of threads, it may not find the correct thread in the first 30 selected.
In fact, the drop-down thread select is empty in at least one situation on AVForums.
As a quick fix, we edited the addon and changed this number from 30 to 100 and the thread appears.
But the query takes 1.5 seconds which is unacceptably slow.
The way that threads are selected needs revamping as the current method is very inefficient.