"No discussions were found" before signing in
I have a situation where if I visit my forum from a new browser, everything looks normal except the list of discussions is empty and just says "No discussions were found." Once I sign in all of the discussions appear as normal. I don't have private communities enabled, and this behavior occurs even using the default theme and with all plugins disabled. The behavior also persists when I delete the cache folder.
This is with Vanilla 2.8, PHP 7.0.33, installed via Installatron on shared hosting. I'm not sure what debug information would be relevant, but any ideas?