PSReadLine: PSReadLine 2.0 Vi mode visual editing with vim doesn't work

I can’t edit a command line in vim with PSReadLine 2.0. This worked fine in previous versions so I think it might have something to do with the change in output encoding.

Environment data

PS version: 6.1.0-preview.503 PSReadline version: 2.0 os: 10.0.15063.0 (WinBuild.160101.0800) PS file version: 6.1.0

Steps to reproduce or exception report

• set $env:VISUAL = 'vim.exe'
• type command to edit
• press ESC
• press v

result:

• press ZQ to exit vim and the previous screen is cleared.

If I change $env:VISUAL = 'gvim.exe' everything is fine since gvim opens out of process.

Behavior is the same with PSReadLine under Windows PowerShell 5.1…