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Didn't play on BBO for awhile, so may be there is some software's default behavior which i'm not aware of, but looks strange.
Express tournament, as you may see on diagram, EW took 4 tricks and E on lead. Club continuation give fifth trick for defense.
At that moment N makes claim for nine (9) tricks total, which i'm rejecting, after several seconds claim appears again for same amount, and momentarily accepted (no time fore reaction). Would please anybody explain me what is going on? I see this behavior second time, but at first occurrence i thought may be I've clicked wrong button.