This one is really tricky. The attached test case shows the problem with hibernate 5.
In addition to the original query, I tried a variant of the query that should actually be supported, but causes a parsing error.
The variant I am referring to is making use of the non terminal derived_collection_member_declaration as defined in the JPA spec which would allow to use the keyword IN before the path expression. I included a test for that case too, so please take a look at it and maybe create a related issue for that.