TL;DRWhenever a moderator moves a thread to a different sub-forum, a link to the thread should be left behind in the old sub-forum, so that the thread can be easily found again.
What ?Currently, when a moderator moves a thread to a different sub-forum (for example from "General Discussion" to "Ideas and Suggestions"), they never leave behind a link to the new thread location. I am suggesting to change this policy by always leaving behind a so-called phpBB "shadow topic".
Why ?By not leaving behind a shadow thread when a thread is moved, it can be very hard for people to find a thread again and they may get the false impression that the thread was deleted. Especially new users will be unaware of the "View your posts" forum feature and this only works for finding threads that you have already posted in.
I have been informed by a moderator that he does not leave behind shadow threads because he was told to do so by the developers.
However, I assume that this only applies to the bug reports sub-forum, because the developers are using that sub-forum as a bug report management system where threads are constantly being moved to different sub-forums based on the status of the bug report. Therefore, the bug reports sub-forum would get cluttered with shadow threads very quickly if they were left behind whenever a bug report was moved to a different sub-forum. Due to this, it is understandable that the developers do not want any shadow threads in the bug reports sub-forum.
But I see no reason against shadow threads outside the bug reports sub-forum.
In contrast to normal threads, shadow threads do not get bumped to the top of the list whenever a new post is made. Only the main thread (which will be in the correct sub-forum) will get bumped to the top of the list.