When Copying, Line Wrapped Text Is Inconsistently Broken Into Multiple Lines

Environment

Platform = Win32NT
Version = 10.0.19041.0
Version String = Microsoft Windows NT 10.0.19041.0
Windows Terminal Version = 1.0.1811.0
SSH Version = OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5
WSL Version = 2

Steps to reproduce

1. SSH into any linux server or open a WSL tab (My testing specifically used an SSH session).
2. create a file called 'test.txt' containing a line long enough to wrap twice with the last wrap having just a few characters.
3. Use more test.txt to list the contents of the create file.
4. Copy the output and paste it into notepad/notepad++
5. Resize the Terminal Window (you can resize and then put it back to the same size)
6. Copy the output again and paste it into notepad/notepad++

The 'more' command was the easiest way to get a reproducible result but I have seen this behavior with many other Linux programs some inconsistently and some consistently.

Expected behavior

Pasted text should be a single line, for both steps 4 and 6, as the copied output was wrapped by the terminal and not broken into separate lines by the output program.

Actual behavior

For step 4, the single line gets broken into multiple lines depending on the size or your terminal and how many lines the text got wrapped into. Then on step 6, the line is correctly copied as a single line.

settings.json.txt

Possible related to #5113 but was directed to create new issuel.

[zadjii-msft]

Does this repro with an ssh from within WSL as well, or does it only repro with ssh.exe?

I've seen it directly in WSL, SSH from inside WSL, and most consistently from ssh.exe to a Linux host. The first two can be hit or miss in reproducing the bug. Even with the most consistent method I posted above it doesn't happen every time. But I did find that in a instance of the Windows Terminal where it happens it will happen consistently but closing out completely and relaunching can sometimes fix the behavior.

[garyo]

Happens to me too. Inconsistent; I can't detect a pattern so far.

[zadjii-msft]

Alright well, I could have sworn there was a dupe for the newer version of this, but I cannot find it. This is now the thread. I'm gonna link this up to #5800.

Unfortunately without a consistent repro I'm not sure how we'll be able to investigate this, but hopefully by the end of #5800, then this will just go away on it's own.