Summary

When the user has configured a Select list (Single Choice) or Label custom field with options containing the character "İ" (eg. Azerbaijani or Turkish language), JIRA will not return any results.

Steps to Reproduce

1. Create a new Select list (Single Choice) custom field or a Label type field
2. Add the character "İ" as a new option Eg. "Problem with İ".
3. If using label type field, add a new label with İ".
4. Associate the custom field with the issue screens.
5. Create a new test issue with this option "Problem with İ" for the field.
6. Go to the Issue navigator and search for: customfield = "Problem with İ".

Expected Results

The issue navigator will return the issues with "Problem with İ" selected for <customfield>

Actual Results

No issues are returned 

Workaround

Replace "İ" character within field options with "I" or "i".