Sub-layers visibility are turned off as default when opening a web application. Sub-layers remain turned off even with group layer checked on.
Last Published: March 17, 2016ArcGIS Online
Bug ID Number
December 15, 2015
September 22, 2022
The bug has been fixed. See the Version Fixed and Additional Information, if applicable, for more information.
Add ‘&level=10’ to the end of the web app URL.
This fix the default extent and keep the layers visible when the application is reopened. The number 1 can be changed based on preferred default extent. The higher the number is, the more zoomed in the extent is. Here is the mortified URL of the application that is tested on:
This workaround does not fit the user's workflow because the application is accessed through the Featured content on the ArcGIS Online home page.