Cocos2d bug with displayFPS

Question

in case displayFPS = NO doesn't work rotation:

- (void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    id rotationAction = [CCRotateTo actionWithDuration:duration angle:angle];
    [_firstSprite runAction:rotationAction];
}

but it works, when displayFPS = YES.

seems fantastic, but..