Console "Discard Old Duplicates" doesn't apply in Windows Terminal

Windows Terminal version

1.14.1861.0

Windows build number

10.0.19043.1826

Other Software

No response

Steps to reproduce

• Open a legacy "Command Prompt" console;

• From the window menu (top-right icon) select "Defaults";

• Check "Discard Old Duplicates" in the "Command History" options group, and "OK" to apply;

  

• Open a "Command Prompt" in Windows Terminal, and enter commands in succession:

  dir
  dir /b
  dir
  dir /b
  dir
  dir /b
  

Expected Behavior

The command buffer should discard previous duplicate entries, as I'm seeing in a legacy "Command Prompt" console – pressing F7 reveals:

Actual Behavior

The "Command Prompt" in Windows Terminal doesn't appear to honor the "Discard Old Duplicates" setting – pressing F7 reveals:

This often causes the inconvenience of losing previous command history, after repeating a few of the same commands in succession for some time.