Hi,

collection proxy might return duplicated records. Defect has been fixed in version 4.3.0.Beta4

is it reported as a separate issue one could track / link?
(the commit message https://github.com/hibernate/hibernate-orm/commit/83421940576f79e1079163f60ef5b7617a28975e indicates this issue, which has fix version < 4.3.0.Beta4)