Run "skipped" without any reason or explanation

For some reason, all of a sudden, runs are being skipped. Absolutely no mention within the run as to why.

Is there a way to find out what is causing the run to be skipped? The same test file, spec file, and iOS app were working moments ago.

It is a bit frustrating trying to find a cause when DF doesn't provide any information - but maybe I am not looking in the right place.