Find .FilterOnReadAccess() and .FilterForVisitor() stops working for anonymous users

Description

1. Use episerver.find 11.1.3 on a cms.core 9.8.0 site.
2. Use .FilterOnReadAccess()
eg. var test = SearchClient.Instance.Search<IContentData>().For(q).FilterOnReadAccess().GetContentResult();
3. Publish a page with some text e.g. "test".
4. Login to the cms and perform a search for "test" and notice you can find the result.
5. Log out and perform the same search.

Expected:
Should be able to see the result.

Actual:
Can't see the result.