Issue Summary

User Picker custom field returns No Matches for the users. This happens when the user picker has the project context, not a global context. It's happened because the REST request does not contain projectId.

Environment

• The user picker Custom Fields has the project context

Steps to Reproduce

1. Create the project - P1,
2. Create two users with similar user name - cos, cos2,
3. Create the User Picker custom field - daj - with P1 project context,
4. Open a simple search,
5. Choose the project P1,
6. Add daj custom field,
7. Open daj user picker dialog and search for the user cos  and pick him,
8. Close daj user picker dialog for instance by clicking somewhere else on the page,
9. Open daj user picker dialog one more time and search for the user cos2.

Expected Results

http://localhost:8080/rest/api/latest/groupuserpicker?projectId=10000&fieldId=customfield_10200&showAvatar=true&query=cos&_=1584541558570

Actual Results

http://localhost:8080/rest/api/latest/groupuserpicker?fieldId=customfield_10200&showAvatar=true&query=cos&_=1584541558577

Workaround

Change custom field context to global