Selective disabling/re-enabling of VT support (ANSI escape sequences) is broken #19395

Prerequisites

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• Refer to Differences between Windows PowerShell 5.1 and PowerShell.

Steps to reproduce

As discussed in #18771, which was inappropriately closed, as well as in #19101 (comment):

Note:

• Applies to conhost.exe windows (regular console windows on Windows) only.

cmd /c ver | Select-String Microsoft

Expected behavior

Microsoft Windows [Version 10.0.22621.1413]

... with the word Microsoft highlighted

Actual behavior

←[7mMicrosoft←[0m Windows [Version 10.0.22621.1413]

That is, the ANSI escape sequences meant to highlight the matching part of the line aren't rendered as such.

Error details

No response

Environment data

PowerShell 7.4.0-preview.2 on Windows

Visuals

No response