As per protocol, I created a EB app which uses an AGOL map. One of the layers is a large polygon layer. Because EB does not currently have category selector widgets like Dashboards does, I was forced to painstakingly create 100+ filter widgets (accessible from a widget holder in a sidebar), in order to facilitate grouped queries.
Two questions:
So I think the bad news is your filters are dead. They are pointed to the wrong map and would have to be re-built.
Good news: Group Filters exist now. https://community.esri.com/t5/experience-builder-tips-and-tricks/setting-up-a-group-filter-and-filte...
Hopefully, you can make fewer filters this time.