I migrated hibernate 5.6.14.Final to 6.1.7.Final and I noticed a problem with entityGraph when exists query with explicit join fetch.

Example project:

• hibernate 6.1.7 - test failed: https://github.com/bherczyk/hibernate_6_bugs/blob/master/src/test/java/com/example/hibernate_6_bugs/Hibernate6BugsApplicationTests.java#L75
• hibernate 5.6.14 - test passed: https://github.com/bherczyk/hibernate_6_bugs/blob/hibernate-5/src/test/java/com/example/hibernate_6_bugs/Hibernate6BugsApplicationTests.java#L75