Something broke recently that's affecting cross-namespace redirects on the Hungarian Wikipedia. This is broken regardless of whether or not you're using the completion suggester beta feature, so it's not directly related, but it's probably indirectly related. We should investigate and fix this.
|T129545 Investigate why cross-namespace Wikipedia redirects have stopped working on the Hungarian Wikipedia
|T129575 Redirects from content namespace to non-content namespace are not indexed in completion suggester