Thanks. This looks like a problem with the enumeration messing with NCrunch's logic to try and identify the underlying method. The test cases will still run and behave normally, but the entry point won't be detected and you won't be able to navigate to the tests using the Tests Window (I think this is the bug report you've just submitted).
I'll need to address this as a code fix. Unfortunately 2.9 is on its way out the door at the moment, so this will probably need to be in the following release.