Wondering if anyone is seeing the same issues with the "Go to First Unread" button/option since the updates?

I've notice this a lot in the past few days... today is a great example. I'm on the board early this morning, catching up on the BPT thread. I'm done around 7am or so, post a reply in the thread, and have read up to the most recent post that time, say page 57. I come back later, click on the thread, and then click on the "Go to First Unread" icon - which I expect to take me to posts continuing on around that time frame I left earlier this morning (would be page 57), but instead it takes me to the very last page of the thread - page 68.

No sure if "go to last unread" and "go to last post" code got mashed up in the recent update? Odd thing is it does not happen every time on every thread, just some of the time.