VSCode notebook do not render multiple plugins like Markdown preview

[Barteus]

Bug Description

The plugins which spawn new "HTML" preview page do not work. One of the examples can be "MarkDown Preview" from markdown-all-in-one plugin. Similar behaviour with others like:

• vscode-data-preview
• live-server
• edit-csv
• regexper

To Reproduce

1. Deploy Charmed Kubeflow 1.7
2. Create a VSCode notebook
3. Download plugin from marketplace and upload to server
4. Install from vsix
5. Create Markdown file and check it's preview

Environment

CKF: 1.7
microk8s: 1.24
Ubuntu 22.04

Relevant Log Output

NA

Additional Context

No response

[syncronize-issues-to-jira]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/KF-5465.

This message was autogenerated

[kimwnasptd]

I tried to reproduce in an upstream KF installation but couldn't. Note that my testing steps were the following:

1. Launch a VSCode 1.7 image
2. Create a test.md file
3. Go to Extensions on the left
4. Install Markdown Editor
5. Open test.md
6. Right click and start command palette
7. Do Markdown: Open Locked Preview to the side

And it showed as expected. Will try with CKF and microK8s

Maybe the root cause is similar to #339 (comment)

[kimwnasptd]

I believe I've found the root cause to be the same as
#339 (comment)