Hang/blank window after reload window with running terminal processes

[egamma]

Testing #127195
On OS X Version 11.4

• open vscode folder
• open a terminal
• in the terminal execute the following script

sh
while true
do
date
sleep 1
done

• execute Reload window

The command hangs, you see a blank window and cannot open the developer tools (sry for the unhelpful screenshot)

Closing the blank window and opening the vscode folder in a new window reconnects to the running process.

Repro behaviour:

• I can reproduce this behaviour about every 2-10 times in the above setup with open vscode folder after waiting a couple of seconds.
• I was not able to reproduce the behaviour when I have a simple test folder containing a couple files open.
• I've failed to reproduce the reload hang when there is no open terminal.
• I've failed to reproduce the reload hang in a remote setup using Remote Containers.

@bpasero any suggestion for how to collect more diagnostic information when in this state?

[bpasero]

code-insiders --verbose --open-devtools

[egamma]

Can be reproduced with no active terminals.

[egamma]

Sample of Main Process.zip
Spindump Main Process.zip
Sample of Renderer.zip
Spindump of Renderer.zip