Presently, if you click on the “Click for More” prompt at the bottom of the page and access a thread below that point, when you go back to the Forum Activity page, it does not return to where you were. It merely shows the 1st scroll/1st page’s worth of threads again.
I’ve been asking for this (or, alternatively, pages on the Forum Activity page instead of the continuous scrolling that always resets itself) for a year and a half at least.