Chess.com did not allow my bishop to move (and take the queen)

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Avatar of astoringa

Hi there. 

Is there any sort of rule why after my opponent promote dto a queen (white pieces) my bishop cannot move?

I was unable not only to take the recently promoted queen but also to move the bishop at all.

Is there any chess rule that I do not know? Or just a bug on chess.com UI?

Thanks 

Avatar of astoringa

Avatar of not_another_day_without

The bishop is pinned to the king (can't move because the king would be in check)

Avatar of astoringa

OMG, you are completely right, I was so blind that did not see this.

Thank you