Inconsistent Search Results With Custom Expando Fields

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.0.0 DXP FP11, 7.0.0 DXP SP2, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: Search Infrastructure
• Labels:
  • backend_test
  • liferay-digital-enterprise-70-sp2
  • liferay-fixpack-de-11-7010
  • liferay-solr5-search-engine-1.0.1
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/46194

Steps to Reproduce

1. Create a custom field, keywordField, for the User entity. Make sure it is searchable "As Keyword"
2. Add a field name pattern to "Search Index Query Preprocessor" in System Settings: "expando__custom_fields__keywordField" (this step will not be necessary to do after this fix is committed)
3. Create a user and fill out the 'keywordField' custom field with "Software Engineer" as the value for the field
4. Go to the homepage and configure the search portlet's Scope to "everything"
5. Search for Software Engineer or software engineer or Software or Engineer or software or engineer...

Expected Result: The user would be found
Actual Result: The user is not found

Reproduced on master - f01b7fb