Most of the time QA should be talking about those things to the PM, and the PM should get the hint that the requirements needed to be more clear.

An under-specified ticket is something thrown over the fence to Dev/QA just like a lazy, bug-ridden feature is thrown over the fence to QA.

This does require everyone to be acting honestly to not have to belabor the obvious stuff for every ticket ('page should load', 'required message should show', etc.). Naturally, what is 'obvious' is also team/product specific.