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  3. Bug: player couldn't move a piece while another was selected

A strange bug had been watched when Mikhail Lushenkov played on his stream. After the opponent had made his move for black the white bishop was selected by the system. After that Mikhail was not able to drag the Queen. (at 1:48:31)

I have also caught the bug. The system selected my knight on d7 after 12. a3 and then I was not able to make my next move c6 until I deselected the knight.