You suggested trying to break Cloud Resources. Too tempting!
Issue #1
I opened a power lookup using a TDNT datatype. It gave three results (TDNT, Abridged TDNT and ESL). With the power lookup still open, I removed TDNT and Abridged TDNT from my library.
Result: All three resources were removed from Power Lookup.
Expected result: The ESL result would have remained.
(Re-running Power Lookup then displayed DBL and ESL. I've no idea why DBL didn't display the first time. I'll look into that and report separately.)
Issue #2
I then also removed ESL and DBL from the library, and clicked on a TNDT reference.
Result: Power Lookup reported that "No resources in your library contain this reference".)
Expected result: A 'web preview' window would open to one of the resources I haven't downloaded.
Issue #3
If Issue #2 is too hard to fix, there's still a problem. Because Power Lookup reported that "No resources in your library contain this reference".) But…
Result: Power Lookup told me I could purchase a new resource.
Expected result: Power Lookup would tell me that I have undownloaded resources that (perhaps) could have opened this result.