For example there were accusations of anti-semitism from within the party. After much silence he announces an inquiry into it.
At the publishing of the inquiry's report he made a speech saying "our Jewish friends are no more responsible for the actions of Israel or the Netanyahu government than our Muslim friends are for those various self-styled Islamic states or organisations.", effectively comparing Israel to ISIS. Views aside, it's a dumb comment to make at an anti-semitism inquiry and instantly undid any goodwill that might be gained from the months of work the report took.
At the same conference, a Momentum leader (the party faction that backs Corbyn) was addressing the event and used it to accuse a Jewish Labour MP of collaborating with right-wing media against Corbyn. Corbyn remained silent and the MP stormed out in tears.
http://www.independent.co.uk/news/uk...-a7111061.html
The person appointed by Corbyn to run the inquiry received a peerage from Corbyn shortly after, compromising her impartiality.
Finally a "zero-tolerance" policy was announced on anti-semitism. A long-term trouble maker in the party who was the Mayor of London but is more known for supporting Chavez and other anti-american dictators and being in constant conflict with the party leadership claimed Hitler supported Zionism. Despite this being like his 5th offense in contravening party rules in general, he was only suspended and not expelled. At the announcement of his temporary suspension and claims of Corbyn being soft on anti-semitism again, he immediately repeated the same Hitler-was-a-Zionist views.