To add another experience to this thread. Yes I have seen this. In my case I run AS on a system typically in the past with between 64-128 GB RAM and have seen it on 40 core GPU M4 Max variants. For me in line mode it will extend beyond the end time text or in waveform view it will result in downspikes to the base of the AS window or the waveform bar will disappear in its entirety.
For me it seems to occur only when playing DSD 128 or 256 classical files and longer pieces of music at that. Last saw it a couple of days ago when playing LSO/Rattle/Eberle Beethoven violin concerto. Seems to be a graphics glitch and a very intermittent one at that. I assume in my case only occurs with larger DSD files trying to cram in a lot of data to the waveform bar as the graphics capabilities of my notebooks are pretty strong. A minor bug to fix, but yes we would all love software to be perfect… not that I will ever see it, all software has its bugs.
For information have seen this for a long time back in macOS Ventura days so not a Sequoia issue.
Edit to show the waveform view with the downspiking glitch…
And an obvious one where it has dissapeared…