It's known to be broken and I expect it to be fixed- eventually. While it's broke i'll do other stuff, 'cause i'm not willing to spend much time on work-arounds that take several extra steps that don't work for me.
BTW, after detouring
through the first page to get to the page that contains the last post i read and i use the first unread button (which for a day or so took me to the correct post ), it now takes me to the first page and back to a page or two AFTER the one i want.
i have a book waiting, where i can easily find where i left off reading. So...later y'all