AutoCAD Civil 3D 2017 Service Pack 1.1 is now available and you can find it via the Autodesk Desktop App. Remember to read the readme file for a list of what’s been fixed and any important information regarding the install of this service pack. Note that this SP is not yet available on the normal downloads page. Our belief is that Autodesk makes them available via the Desktop App first to encourage you to use this tool. Not sure what difference it makes to them how we get our SP, it’s not like there are ads in the Desktop App.
There is no mention about whether or not this fixes this problem (see comments 4 and 5) that is thought to have been created by SP1.