Looks good.

This query as described above:
https://10.16.6.125/api/categories?expand=resources&filter[]=name=%27location%27

Produced this result:
{"name":"categories","count":23,"subcount":1,"resources":[{"href":"https://10.16.6.125/api/categories/306000000000001","id":306000000000001,"description":"Location","read_only":false,"syntax":"string","single_value":true,"example_text":"The geographic location of the resource, such as New York, Chicago, or London.","tag_id":306000000000004,"parent_id":0,"show":true,"default":true,"name":"location","actions":[{"name":"edit","method":"post","href":"https://10.16.6.125/api/categories/306000000000001"},{"name":"delete","method":"post","href":"https://10.16.6.125/api/categories/306000000000001"},{"name":"delete","method":"delete","href":"https://10.16.6.125/api/categories/306000000000001"}]}],"actions":[{"name":"edit","method":"post","href":"https://10.16.6.125/api/categories"},{"name":"create","method":"post","href":"https://10.16.6.125/api/categories"},{"name":"delete","method":"post","href":"https://10.16.6.125/api/categories"}]}

Moving to Verified using 5.5.3.3 with appliance referenced above.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2016:0616