Unable to read anything from the ConPTY output pipe

[wfjsw]

I implemented a ConPTY terminal based on the API described here and AnonymousPipeServerStreams in C#. Everything goes smoothly but I am unable to actually read anything out of the pipe connected to the hOutput handle. Since there is no error happening anywhere I am lost trying to debug this.

Is there any general suggestion regarding how to debug this issue?

Relevant code: https://gist.github.com/wfjsw/8ccd7768d8ea78169ec29939fe73642b

Update 1:
It seems none of the CREATE_NEW_CONSOLE, DETACHED_PROCESS or CREATE_NO_WINDOW should be set or it will cease to work.

Now I am able to receive some content from the ConPTY, but it is significantly delayed. The data only comes in after the process is somewhat completed. Though they would reach the Console of the parent process in real time.

[wfjsw]

https://youtrack.jetbrains.com/issue/RIDER-103497/Run-Debug-Console-changes-how-ConPTY-works