It's no longer possible to search for assignable user by email in 8.19+.
- Create a test user where email address is different than full name and username. Example:
Full name John Smith Username jsmith Email address firstname.lastname@example.org
- Open an existing issue and edit the assignee.
- Start typing the email.
- Do the same with a new issue in the assignee field.
John Smith should be highlighted as a match. This used to be the case before 8.19.1.
John Smith is not matched.
Search using full name or username.