That's a little trifling detail. The Corbynista's obviously don't mind letting the Tories win just as long as they have a party that reflects their view or supposedly gives a 'genuine' choice to the electorate. Then they have the gall to moan at those nasty Tories bafflingly hypocritical IMO!
As it was when JC was just a humble MP. He defied the whip hundreds of times although his rebellions were mainly ideologically inspired rather than helping individual constituents.