Issue Summary :

Searching for users with a certain property via REST API returns empty string.

Environment

Jira Cloud

Steps to Reproduce

1) Set a custom property for a user via Set user property (PUT)
Use a body like this to define the property:

{"PropertyKey":"PropertyValue"}  

2) Confirm that the property was correctly set:

<sitename>.atlassian.net/rest/api/3/user/properties/<property-name>?accountId=<the Atlassian Account ID>

3) Search for all users with that property via Find users (GET)

<sitename>.atlassian.net/rest/api/3/user/search?property=<propertyname>.value=true

Expected Results

All users with that property will be returned

Actual Results

Inconsistent results are retrieved, sometimes only one user comes up, and sometimes it returns an empty string ([])

Workaround

Try this instead:

<sitename>.atlassian.net/rest/api/3/user/search/query?query=[PropertyName].PropertyKey is "PropertyValue"

PropertyName refers to the name you gave to the specific property

PropertyKey and PropertyValue refer to the payload you sent during the call to set the property in this format:

{"PropertyKey":"PropertyValue"} 

For reference:
https://community.developer.atlassian.com/t/jira-cloud-api-searching-for-users-who-have-a-specific-user-property-set-via-the-api/38885/13
https://community.developer.atlassian.com/t/uql-searching-users-with-defined-property/10864/2