Cannot search for object entries using the relationship with the headless API

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: Master
• Fix Version/s: None
• Component/s: Objects
• Labels:
  • 7.4-known-issues
  • liferay-ga36-ce-743-known-issues
  • liferay-ga37-ce-743-known-issues
  • liferay-ga38-ce-743-known-issues
  • liferay-ga39-ce-743-known-issues
  • liferay-ga40-ce-743-known-issues
  • liferay-ga41-ce-743-known-issues
  • liferay-ga42-ce-743-known-issues
  • liferay-ga43-ce-743-known-issues
  • liferay-ga44-ce-743-known-issues
  • liferay-ga45-ce-743-known-issues
  • liferay-ga46-ce-743-known-issues
  • liferay-ga47-ce-743-known-issues
  • liferay-ga48-ce-743-known-issues
  • liferay-ga49-ce-743-known-issues
  • liferay-ga50-ce-743-known-issues
  • liferay-ga51-ce-743-known-issues
  • liferay-ga52-ce-743-known-issues
  • liferay-ga53-ce-743-known-issues
  • liferay-ga54-ce-743-known-issues
  • liferay-ga55-ce-743-known-issues
• Fix Priority: 4

Steps:

1. Create two objects with text fields, "Employee" and "Department"
2. Create a one-to-many relationship, "Department" to "Employee", titled "Department to Employee"
3. Create several object entries for each and relate the "Employee" entries to the "Department" entries
   1. Note the ID for the Department entries
4. Navigate to localhost:8080/o/api > REST Application > c/employees
5. Expand getEmployeesPage
6. Search for department
   1. departmentId eq XXXXX
7. Click execute

Expected result:
Expected only the employees related to departmentId to be returned

Actual result:

WARN  [http-nio-8080-exec-8][BaseExceptionMapper:70] Problem {detail=null, status=Bad Request, title=Incompatible types., type=null}
com.liferay.portal.odata.filter.InvalidFilterException: Incompatible types.

Reproduced on:
Tomcat 9.0.56 + MySQL 5.7
Portal master GIT ID: 0b5fc90dc43557eec5200c247a5ea7389f308cd1