If we receive a response which declares the existance of a duplicate radar but does not provide a radar object, we should ignore that "duplicate" since we can't query a radar for which we cannot retrieve the ID.
<rdar://problem/117502065>
Pull request: https://github.com/WebKit/WebKit/pull/19572
Committed 270922@main (7812e1fae6d3): <https://commits.webkit.org/270922@main> Reviewed commits have been landed. Closing PR #19572 and removing active labels.