Terminal: CLS in CMD shell doesn't clear scrollback

[nurbles]

In a stand-alone CMD window, the CLS command clears not only the text currently visible in the window, but all of the history in the scrollback buffer. In a Windows Terminal CMD tab, clear is clearing only the currently visible text, leaving the scrollback content untouched.

Environment

Windows build number: Microsoft Windows [Version 10.0.18362.239]
Windows Terminal version (if applicable): 0.3.2171.0

Any other software? no

Steps to reproduce

1. Open a command (CMD) tab.
2. Execute enough commands to put data in the scrollback buffer.
3. Execute cls
4. Observe results

Expected behavior

I expect the screen and scrollback buffer to be completely cleared.

Actual behavior

Only the screen is cleared.

[richardcox13]

This also happens with PowerShell.

[j4james]

I believe this is a duplicate of #1305.

[DHowett-MSFT]

Looks like! Thanks.