I had been tracking these issues with the project disk a couple of weeks ago: the long waits and the I/O errors https://glitch.com/~trusted-seemly-ceres (discussion /dev/xvdp1 is extremely slow occasionally). I stopped when things started working kind of okay again. Scroll to the bottom and click ‘load older’ twice to see that it happened on Jun 21 2020. This stuff might even be related to why sometimes people’s code gets replaced with dots.
@glitch_support, could you please monitor disk latency and I/O error rates and display them on the status page?