Buffer still goes missing when using python in terminal with Windows Powershell/pwsh6/cmd

[Jarvis73]

Environment

Windows build number: Microsoft Windows [version 10.0.18362.356]
Windows Terminal version: 0.4.2382.0
Windows Powershell: 
                     PSVersion                      5.1.18362.145
                     PSEdition                      Desktop
                     PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
                     BuildVersion                   10.0.18362.145
                     CLRVersion                     4.0.30319.42000
                     WSManStackVersion              3.0
                     PSRemotingProtocolVersion      2.3
                     SerializationVersion           1.1.0.1
Pwsh 6:
                     PSVersion                      6.2.2
                     PSEdition                      Core
                     GitCommitId                    6.2.2
                     OS                             Microsoft Windows 10.0.18362
                     Platform                       Win32NT
                     PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
                     PSRemotingProtocolVersion      2.3
                     SerializationVersion           1.1.0.1
                     WSManStackVersion              3.0

Steps to reproduce

1. Open any of the WindowsPowershell/pwsh/cmd in windows terminal
2. Install python package pyreadline
3. Input python and enter interactive mode
4. Press Enter a bunch of times, until current view goes up
5. Lines at the top got missing and can not scroll up

Expected behavior

All the lines at the beginning should be kept and scrollback/scroll bar should appear

Actual behavior

• cmd
  

• pwsh
  

• Windows Powershell
  

Note

• I think it is not the problem mentioned in Buffer goes missing when using powershell #2410 and PSReadLine, because I have fix the PSReadLine problem by installing v2.0.0-beta4
  
  

• Besides, build-in Windows Powershell is correct:
  

[DHowett-MSFT]

Nobody over here can repro this, but we're keeping it open because clearly it's an issue.

[Jarvis73]

I found python package pyreadline causes the problem. Temporarily I can skip this bug by uninstalling the package. But I think it is still necessary to fix it.

[DHowett-MSFT]

Is this still happening? With PWSH 7 😄

[Jarvis73]

It seems that the problem has gone.

[DHowett-MSFT]

Thank you!