Jira search keeps suggesting searches that it cannot actually perform

I keep getting suggested searches that would be useful to get the results of, but frequently these simple suggested searches fail to return any results. 

Example: 

or:

Both of these searches should return results - I do have open tickets (both created and assigned) and I have tickets that are high priority as well. 

Jira should either make these searches work, or stop suggesting searches that aren't going to work.