Personally I think we opened a can of worms attempting to auto-apply parenthesis for users. The basis of that seems to be a belief that "the JPA implementation is supposed to add them", which is flat out inaccurate; JPA does not even define support for multi-valued params - that's a Hibernate feature. And I have always agreed with Christian's sentiment: I think the onus should be on the user to define the parentheses.

However, since we did add this auto-parenthesising I think this has to be a regression