Howdy Robin,
Thank you for the update and all of the details. I would love to help you with this.
When a change takes a while to apply it is basically guaranteed to be a caching issue. There are numerous caches that can be the culprit, but often we only think of our local browser cache. Here is a list of common ones:
- Browser Cache
- CDN Cache
- Server cache such as a WordPress plugin or apache/nginx config
If you’re not sure if your host had automatically setup a CSDN or server cache for you, double check with them. Open up a support ticket and they should be able to fill you in on the details.
Have you double cleared each of those after making you change?
Cheers!
– Brook