Blocks search in edit-mode does not include blocks in "for this page"

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I have a page with several blocks in "For this page". When I search in the Blocks pane, these blocks do not appear in the results. I can see that the server call returns {}&&[]. Is there anything special I need to do so that those blocks are included in the search results? We are using Find for search and Episerver version is 10.8.0.0.

#182279
Edited, Sep 14, 2017 10:41
* You are NOT allowed to include any hyperlinks in the post because your account hasn't associated to your company. User profile should be updated.