When visiting my site, sometimes I’ll get a bunch of 500 errors on all of the JavaScript files, usually on first pageload (even if the files are, or should be, cached). Sometimes they say NS_ERROR_CORRUPTED_CONTENT.
My theme is loading fine (the background was removed for visibility) but besides that there should be nothing causing this. It is fixed by waiting 30 seconds and reloading.
My site is up to date on the almost latest commit (2 behind) and there is nothing weird in the logs. My disk cluster is healthy. What is causing this and how do I fix it?