Environment

• OS: Microsoft Windows NT 10.0.18362.0
• PowerShell version: 6.2.4
• posh-git version/path: 1.0.0 beta3 ~\Documents\PowerShell\Modules\posh-git\1.0.0
• git version 2.25.0.windows.1

Steps to reproduce

In a PowerShell, with posh-git and git-for-windows (which includes git gui) installed:

When typing git gui, the git gui window opens, but on the powershell prompt, the encoding of the characters is outputted and the cursor stays on that line. Only after pressing "Enter", the prompt becomes "normal" again.

~\MyProj [mybranch +2 ~2 -0 !]> git gui    <-- nicely colourised
~\MyProj �[93m[�[0m�[96mmybranch�[0m�[31m�[49m +2�[0m�[31m�[49m ~2�[0m�[31m�[49m -0�[0m�[31m !�[0m�[93m]�[0m>    <-- no colours, "weird" output. Have to press "enter" to get prompt to normal again.
~\MyProj [mybranch +2 ~2 -0 !]>    <-- nicely colourised

Expected behavior

Quite obvious I think, the PowerShell prompt should output the "normal" prompt with the coloured characters and stuff (from posh-git).

Actual behavior

Stuff like �[93m[�[0m is output (see above/screenshot).

Related issues

I've opened dahlbyk/posh-git#738 first but the author suggested it's likely a git-gui issue. I've then opened prati0100/git-gui#34 but the author said it might likely be a Windows Terminal issue and related to #4809. After posting in #4809, @DHowett-MSFT advised to open a new issue here, as my issue is with PowerShell, and not with git-bash.