Ray init fails to register workers

Hi, I am seeing a strange issue with the newer versions of ray (1.10 and above) where if I start ray from jupyterlab with ray.init() i get a kernel crash and Failed to register worker xxx to Raylet. Invalid: Invalid: Unknown worker.

However, if i run ray start --head from the shell, and connect with ray.init(address=‘auto’) it works fine.

Any reason why ray.init() might be going on timeout? Where should i start looking?