Lines scrolled up by less command remain to exist after quitting the command

[sh-ikeda]

Environment

Windows build number: Microsoft Windows [Version 10.0.18363.657]
Windows Terminal: 0.9.433.0
WSL1
Ubuntu 18.04
bash

Steps to reproduce

1. Open Ubuntu 18.04 on WSL
2. Fill the console screen with any outputs
3. Run less command
4. Scroll down
5. Quit less command
6. Scroll up

Expected behavior

The console screen recovers to the state just before the less command

Actual behavior

Lines scrolled up during the less command remain to exist above the upper boundary

This does not happen in the default console of WSL and ConEmu.

[DHowett-MSFT]

This one's actually a /dupe of #381 -- Terminal doesn't know that Less has switched to an alternate screen mode, and therefore it doesn't know not to push those lines into scrollback.

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!