So far they've had their deputy leader quit, Williamson leaving and Ian Austin telling people to vote Tory. Yes there's a problem.
Williamson leaving was a good thing and Austin literally started an anticorbyn campaign group called mainstream a few months ago (they did that negative poll of labour supporters that hit the news in September and also had an anti-corbyn banner outside the Labour party conference) so I don't know why it's suddenly news that he's anti-corbyn.