Cannot SSH via cloud shell code editor

[TurboP]

Hello,

Using cloud shell code editor (ide.cloud.google.com), when clicking "Open SSH" on a running instance in the "Cloud Code" extension (compute engine subcategory) :

it gives this :

A blank terminal. It seems the instance is not reacheable through whatever command GCP uses when cliking the "Open SSH" button.

Note that SSH via cloud shell terminal and on compute engine console works perfectly through default port 22.

What is the reason for this blank terminal and how to solve this ? Search on the community was unsuccessful. Thanks