As it was promised that it would get a fix I've let this go for a while.
But now it turns out it is still behaving erratically.
The way this is being handled is quite poor.
It is obviously not working as it should, but during reporting it seems as if I'm hitting a brick wall.
The issue at first didn't get an acknowledgement and later it was handled as something of low-priority.
I see this completely different. The Plesk manager is supposed to help me with all the settings I can do.
Now it is, on its own initiative, changing parameters on my setup.
This behaviour is confirmed by other users of Plesk, but still nothing has changed.
It is doing this now almost a year.
I've also waited 4 years for SRV-records to behave as they should (
http://talk.plesk.com/threads/srv-records-can.114958/)
Come on Odin, thanks for the nice high resolution icons, but now fix things for the real reason why we have Plesk!!