This highlights the perils of using a free platform for business purposes. They owe you nothing and can change how things run/policies overnight and without warning. Luckily in this case, LinkedIn only brought in about 4% of their clients, but some businesses are fully reliant on free services like Facebook.
It is a shame they rolled this to production. With no real posting or activity going on in their early integration platform, of course it is no surprise.
OP should try "Japanese knowledge not required" but still, shouldn't be necessary to be on our toes due to untested automation.