Cannot get OPEN_REQUESTS via API

[Allan Libby]

I am trying to get a list of open requests from a service desk of a particular request type via the Service Management api.

When I run my query with requestStatus=CLOSED_REQUESTS it works fine.

When I run it with requestStatus=OPEN_REQUESTS it returns 0 results.

When I check in JQL with resolution = "Unresolved" in the GUI, I get 11 results, so I know I have 11 open requests.

In looking online it says that OPEN_REQUESTS sent to the API should be the same as what I have in my JQL. 

Any help would be appreciated, thank you!