This is part of the Semicolon&Sons Code Diary - consisting of lessons learned on the job. You're in the dumb-mistakes-and-gotchas category.
Last Updated: 2024-04-19
The first port of call when stumped by something should be to increase the log level. With the service worker caching issue in project M, I never noticed that it was logging request info to DEBUG in DevTools. This could have helped.