@muktupavels (#127): I do not have this bug in 18.04.1 LTS. My settings persist over a restart.
One thing I noticed though is that the screens are reset every time when switching to "Built-In Only" and then "Join Displays" via WindowsKey+p. A workaround I found for this is to switch back to "External only" and then to "Join displays". This restores the settings. Hope this saves anyone some time.
@muktupavels (#127): I do not have this bug in 18.04.1 LTS. My settings persist over a restart.
One thing I noticed though is that the screens are reset every time when switching to "Built-In Only" and then "Join Displays" via WindowsKey+p. A workaround I found for this is to switch back to "External only" and then to "Join displays". This restores the settings. Hope this saves anyone some time.