I had the same problem and now the answer is somewhere deep in the FS Bikes
for Sale on Craigslist thread around July 29. 2021. The answers I got were
to:
1. Put the cursor on the text of the top message, and hit the END key.
Zooms right to the bottom.
2. And for Mac keypads w/o an END key, "
The only trick I have on my Android is to click on the thread and swipe up
fast to get it going. It'll stop in the middle to catch up, then I do it
again. If you click and just wait a minute it won't do that pause. It's all
annoying, that Craigslist/Ebay thread is so bad I rarely look at it.
J