Transparent background for text set to a black background in PowerShell

[Johbii]

Environment

Windows build number: 10.0.18363.778
Windows Terminal version (if applicable): 1.6.10571.0

Any other software?
Powershell version: 5.1.18362.752

Steps to reproduce

1. Open a PowerShell instance in Windows Terminal
2. Enter Write-Error -Message "anything" (or otherwise receive an error/warning/any message with a black background)

Expected behavior

Critical error messages and warning messages are outlined with a black background to be more readable and noticeable compared with regular output (as is default with PowerShell).

Actual behavior

Any text highlighted with a black background is made transparent/changed to the color of the terminal background.

Notice 40m is black on the old console host but not in Windows Terminal.

[j4james]

Quoting DHowett from issue #9115 (comment):

Unfortunately, this is by design. PowerShell erroneously tells us to use a black background so often that it would cause there to be black streaks across the display (even if the terminal background was set to white or acrylic transparency.)

We had to disable black for PowerShell, specifically. #6810. Tracking the "fix" in /dup #6807.

[Johbii]

Quoting DHowett from issue #9115 (comment):

Unfortunately, this is by design. PowerShell erroneously tells us to use a black background so often that it would cause there to be black streaks across the display (even if the terminal background was set to white or acrylic transparency.)
We had to disable black for PowerShell, specifically. #6810. Tracking the "fix" in /dup #6807.

Oh OK, thanks for responding. Sorry for the dupe I wasn't aware of the issue.