This still happens in 5.2.14.Final. CollectionChangeWorkUnit.generateData mentioned in the description leads to MultiPropertyMapper and there we have

							ret |= propertyMapper.mapToMapFromEntity(
									session, data,
									newObj == null ? null : getter.get( newObj ),
									oldObj == null ? null : getter.get( oldObj )

plus an other method with similar implementation but with mapModifiedFlagsToMapFromEntity method. getter.get causes then the unnecessary loading