CloudKit queries failing, need reindexing

See FB22358865. I have a formerly working app. From within the app, Queries to 4 'Record Types' work fine. Queries to one Record Type return only some records. When I 'Query Records' from the CloudKit dashboard I get 100-300 records downloaded for this Record Type. If I repeat 'Query Records' I get an additional 100-300 records. There are more than 4000 records. Apple Developer Technical Support has stated 'the index in your CloudKit container gets in a bad state." How can I fix this?

CloudKit queries failing, need reindexing
 
 
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