I am so glad someone mentioned this! The past 2 or 3 days this has been happening to me and I thought it was just on my end, I thought I was going crazy! Only happens on my mobile app. I am using the Jerboa app for reference. Perhaps an API issue? I am not sure. I recommend just using it on a mobile web browser using oldsh.itjust.works for the time being.
Edit: Use the alternative URL oldsh.itjust.works instead. The issue is not isolated to mobile apps, the page 2 timeout occurs to me only on the main sh.itjust.works site even on browser.

I just realized I normally use the oldsh.itjust.works to access this site and that works fine for me both logged in/out, but after trying the normal sh.itjust.works site I see the page 2 loading issue on desktop too now.