We have installed sales hub App in D365 online v9.0 and created custom dashboard for queue items. Also we have installed D365 App on iPhone and tablet and were able to access custom dashboard. User didn't want old queue items to appear in the view in App so decided to get rid of them from queue, on desktop D365 on dashboard deleted items disappeard but on the App we can still see those deleted items.
We tried to sign out/reconfigure/reinstall app (due to caching issue) but no Joy. Couldn't find anything on web, if anyone come across such issue or if there is any setting related to Syncing data between App and D365 please let me know.