I've managed to load up most of anvita overnight, which generates a lot of listener output -- around 700K. Somewhere along the way, the listener has become very reluctant to scroll to the end of the buffer. M-> doesn't work, going to last shown line and doing ctl-f or ctl-n doesn't work, moving the scroll bar doesn't work (i.e. it scrolls, but never to the end of the buffer). At first I thought the lisp froze up, so I did cmd-A cmd-C to copy the listener output to emacs, and found there was more stuff at the bottom that wasn't showing in the IDE. The only thing I found that works is sometimes resizing the window will show you more. It doesn't unwedge it, it just shows more of whatever is available at the time, but any output after that still can't be scrolled into view.