Hi Remco,
seems that there is an issue with lines that have already breakpoints.
I'm using latest NCrunch v2.11.0.23 and VS 2013 Update 4.
If I manually set a breakpoint in a line where a test fails (by clicking on the left border area of the window where the breakpoint gets shown) and then open the NCrunch's context menu and choose "Break into the first failing covering test at this line", nothing happens. But if I remove the breakpoint and open the context menu and click that entry, then NCrunch sets a breakpoint and starts the test as expected.
If I set the breakpoint by pressing F9 key, NCrunch behaves as expected.
Best regards,
Ralf Koban