Hi Matt,
I'm sorry you had this problem. Unfortunately it's due to having an older version of your site (without the pages) in an old browser tab and hitting save. The site loses knowledge of the pages but the items still exist.
A few more details: Usually what we see with this issue is the browser tab where you made the pages is different from another browser tab where you were editing the site. You probably created the pages then switched browser tabs and saved the site. The pages still exist but the site has no knowledge of them. The best way to fight against this is to always refresh when switching browser tabs or just stick to a single tab.
In the long run w're working to solve this concurrency issue more broadly but we need to have a better answer for communicating item updates to connected apps more broadly (so a change in one tab shows up in another and conflicts between the changes are handled elegantly)
In the short run, the good news is this issue is very fixable. You can either...
- Delete the page items in ArcGIS Online and re-create them in the Hub admin app and try to keep to working in a single tab or get into the habit of refreshing a stale tab when you switch to it. It's a workaround for sure.
- If you spent a lot of time on the existing pages which were orphaned, please contact support and we can work with your site to manually un-orphan the separated pages.
Please let us know if there are any other questions
