User within organization cannot Share issue with himself

Description

When a user that is within an organization tries to Share an issue with himself, an error pops up saying that he does not belong to the organization.

Steps to Reproduce

1. Create a Service Desk project
2. Create an organization
3. Add User 1 and User 2 to it
4. Create an issue as User 1
5. Login as User 2, access the create request and attempt to add yourself through the Share option
6. An error saying that the user does not belong to the Organization will pop up

Work around

1. Have an agent manually add the user through JIRA's request participant feature on the issue