Copying selected multiline overflowed text broken since iTerm2-3_5_20241127-nightly

Bug report

Thanks for filing an issue! Please answer the questions below so I can help you.

iTerm2 version: iTerm2-3_5_20241127-nightly
OS version: 15.1.1 (24B91)
Attach ~/Library/Preferences/com.googlecode.iterm2.plist here (drag-drop from finder into this window) com.googlecode.iterm2.plist
Attach a debug log, if possible.
Attach a screen capture video if it would make the reproduction steps clearer.

PLEASE ATTACH YOUR PLIST FILE FOR BUG REPORTS! Seriously! I'll probably ask you for it if you don’t.

Detailed steps to reproduce the problem

Open a small terminal window, and type a long command that overflows into the second line, something like ls some/very/very/long/path/that/will/overflow/to/the/next/line/and/trigger/some/bug
Select the command text and copy:
Paste the copied text

I'm using the beta versions, and it started happening in the latest beta. I also verified the nightly builds, iTerm2-3_5_20241127-nightly.zip is bad, and iTerm2-3_5_20241125-nightly.zip is good.

What happened

The copied text is ls some/very/very/long/path/that/will/overflow/to/the/next/line❯ ls some/very/very/l

What should have happened

The copied text should be ls some/very/very/long/path/that/will/overflow/to/the/next/line/and/trigger/some/bug