This morning I noticed that my openHAB App on my iPhone got updated (new icon) and notified me to install the new App.
After installing the new openHAB App Version 3.0.1 and deleting the old one (2.4.57) my main sitemap remains empty. Connections settings are ok as my two other Sitemaps are still working fine.
In the mean time, the other app is still available to use. There have been a few small improvements to sitemap rendering in the new app, but i don’t have an immediate idea of what would be breaking. It will probably be helpful to show your sitemap code in the issue.