Red lines appeared with recent versions

Assessment

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Description

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version:

Version: 1.126.0
Commit: 7e7950df89d055b5a378379db9ee14290772148a
Date: 2026-06-23T01:46:13Z
Electron: 42.2.0
ElectronBuildId: 14159160
Chromium: 148.0.7778.97
Node.js: 24.15.0
V8: 14.8.178.14-electron.0
OS: Linux x64 7.0.14-arch1-1

• OS Version: Arch Linux

Steps to Reproduce:

1. Run any terminal application.
2. Tested on two themes included default.

With the last two releases I see these annoying lines in the terminal which usually appear on progress bars:

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