See
Rules for posting in K 3.0 Support category
Daviciacus wrote: Someone creates a topic with a particular [subject but] suddenly, in one of the later replies, ... the topic [subject] changes. It is not the person who posted the reply who did this, though, it seems to happen on its own ...
It
is possible for the person posting a reply to choose a different subject when replying, in the reply. Only two people can change the subject of the topic: the topic owner or a forum moderator.
Daviciacus wrote: ... it seems that Kunena suddenly takes the name of a different topic instead
The topic name is inherited from the subject of the first message posted
or when someone performs a moderator action. Unless there is a ghost, these are the only two ways a
topic subject can change. Each
reply can have a different subject to the
topic subject. These replies can, in turn, create new threads within a topic. The person who creates the topic can edit their message and change the subject. The new subject will affect later replies. If a person starts a new thread within a topic, then all replies to that thread will use the subject of that thread. The difference between the subjects is whether people use the
Reply Topic or
Reply buttons. There is no defect here; this is how
Kunena works.
Daviciacus wrote: Kunena is version 3.0.0
K 3.0.0 is unsupported. This topic does not meet the requirements for support (reporting a defect).
Daviciacus wrote: I'm not sure what else the diagnostics report is supposed to contain, if you need any more information please let me know)
We will not ask you for your configuration report. Either you will give it to us (without us asking for it) or you will not. For your information, topics posted in this support/defect-reporting category that do not include the configuration report are generally ignored by the developers.
For more on your question, please read
Why is the subject changing all the time?