Results 2 comments of Brendan Bycroft

This appears to be a regression from AspNet.OData to AspNetCore.OData, where the batch handler crashes when trying to parse a batch request that contains sub-requests with relative urls (using Content-ID's),...

@nonissue In your playground, there's a change in behavior depending on whether there's trailing whitespace on Line 6 (line after - Nested Item 2)