When switching the search type from All to Hashtag or Twitter Account, it deletes any text typed in the search field. This is counter intuitive, as the Search Type is below the text field. 

Changing the search type after typing in text should prepend the existing text with the @ or #, not remove the text and just add a # or @.
macOS 10.14.6
TheBrain 11.0.119

Thanks for reporting. This is already a known issue and has been reported previously. 

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