Default Forum issue: Thread Display Mode

My settings are:
Thread Display Mode: Linear - Newest first.
When I post, I used to return to the newest post, i.e., the one I've just posted.
Now, I'm returning to the first page of the thread (and not even the 1st post, O.P., but to the first page).

Is there anything wrong in my settings? How can I turn back to the original behavior?
Did xda forum changed its behavior?
avast! team member
Samsung Galaxy S4 GT-9505 SlimKat and other AOSP ROMs in MultiBoot with Alucard kernel.
Samsung Galaxy Tab 10.1 GT-7500 Nameless.