A few days ago, we began experiencing issues with a Sidebar instant app. Specifically:
The instant app and all of our layers are hosted on our ArcGIS online account. No changes have been made to our app or the underlying web map to trigger these issues.
Would this have anything to do with the recent update?
It's a bug: Solved: Re: Instant app Sidebar issue identify after last ... - Esri Community
Cheers
Stefano