I've got one solution that has projects for Windows Store (UWP) and for iOS.
When I was building the package for Windows Store in Visual Studio, I have noticed one strange thing - in the output there was text connecting to Mac and then Building the project with the name of iOS project.
After I have disconnected from the Mac server and restarted the build everything worked fine.
Is this a bug and how does it affects building of UWP packages? Just the text one should ignore, wasted time because some redundant work is being done or even some problems in the final package?