Browsers cache service workers for 24 hours by default
read up a bit on this and found this progressive web apps - Service worker JavaScript update frequency (every 24 hours?) - Stack Overflow
" The one exception to standard HTTP caching rules, and this is where the 24 hours thing comes in, is that browsers will always go to the network if the age of the service-worker.js entry in the HTTP cache is greater than 24 hours. So, functionally, there’s no difference in using a max-age of 1 day or 1 week or 1 year—they’ll all be treated as if the max-age was 1 day."