Thanks for the link, but all the projects were building and tests were running. Checked the mentioned settings about Instrument Output Assembly and it was set to true.
But it seems like a temporary glitch. I restarted all VS instances and when I started up the project again and manually build, it still wasn't showing any coverage. Also tried restarting the Ncrunch engine, but it didn't help either. Though, when I later changed the actual code to be tested, it seems like ncrunch picked it up and started showing the coverage. Seems like a weird error though, since it didn't help to neither restart the engine or VS.
But all good now, so thanks for the quick response :)