It was actually reported a few pages back, but it had been reported (by me) already on the bugtracker prior to this report (hence, "already reported internally").

Already reported internally as #29765, thanks for reporting anyways!

I drove past it a few times and couldn't really notice it. I'm sure many players would never notice it, but it's reported now anyway.

This bug is very hard to notice when viewing from the cabin in both directions, so I think it's not really a bug

Cannot replicate on a ProMods only profile
https://i.imgur.com/oOddoES.png

Also this is an SCS area, so if you spot any bugs in an SCS area, be sure to check on a profile without mods to determine whether or not it's an SCS or ProMods bug.

This isn't a ProMods problem - SCS have done this intentionally

I wouldn't be too optimistic to see if those cities will be added. From what I can see, there could be enough space for Münster (unlikely to be built since the surrounding area would need some sort of reconstruction), Freiburg and Cloppenburg. The other cities, especially Lübeck, look almost impossi...

The invisible walls have been removed in 2.52, as Bad Oeynhausen was completely rebuilt. As such, there is no "fix" for them in 2.51.

Already reported internally as #29739, thanks for reporting anyways.