This can be caused by a couple of reasons, most commonly:
1- The .bashrc or other shell configuration files were modified.
2- Storing unusually large amounts of data in the home disk.
3- Adding some programs to automatically start up on login.
You can choose to reset your Cloud Shell by doing "sudo rm -rf $HOME" and restarting the Cloud Shell VM. This should give you a clean state but make sure to backup your data before doing so (this will delete all data). If this solution is not feasible or you are still affected after doing the above, you should consider reporting the issue on our Issue Tracker so proper attention can be given to it.Thanks for your kind reply. Fortunately everything was normalized. I did not have to make any adjustments. Just wait patiently.
Unfortunately I have no way to reproduce the problem to report the issue. But it is clear to me now that there was a problem in GCP that prevented me from connecting via SSH to my cluster.