Preflight Checklist
What's Wrong?
Output from claude in the VS Code integrated terminal intermittently becomes garbled. Clicking and dragging over the affected region forces a partial repaint and makes the text readable again, which points to a terminal renderer issue rather than malformed output from Claude Code.
What Should Happen?
Terminal output should render cleanly without requiring user interaction to force a repaint.
Steps to Reproduce
Intermittent and non-deterministic. There are no reliable repro steps. Not correlated with any specific command or output length I can identify. Happy to test alternative renderer settings if useful.
Claude Model
Opus
Is this a regression?
Yes, this worked in a previous version
Claude Code Version
2.1.143
Platform
Anthropic API
Operating System
macOS
Terminal/Shell
VS Code integrated terminal
Additional Information
Visual symptoms
See screenshot. Latin characters are replaced with fallback Unicode glyphs, but layout, colours, and Claude Code's UI elements all render correctly. Consistent with glyph cache / texture atlas corruption, not malformed output.
Key diagnostic observation
Selecting the garbled text forces a repaint of the highlighted region, which makes it readable. Releasing the selection often reverts the area to its garbled state.
Prior reports
Several similar reports have been filed over the past year, many closed without resolution. Happy to link them if it helps consolidate the investigation.
Preflight Checklist
What's Wrong?
Output from claude in the VS Code integrated terminal intermittently becomes garbled. Clicking and dragging over the affected region forces a partial repaint and makes the text readable again, which points to a terminal renderer issue rather than malformed output from Claude Code.
What Should Happen?
Terminal output should render cleanly without requiring user interaction to force a repaint.
Steps to Reproduce
Intermittent and non-deterministic. There are no reliable repro steps. Not correlated with any specific command or output length I can identify. Happy to test alternative renderer settings if useful.
Claude Model
Opus
Is this a regression?
Yes, this worked in a previous version
Claude Code Version
2.1.143
Platform
Anthropic API
Operating System
macOS
Terminal/Shell
VS Code integrated terminal
Additional Information
Visual symptoms
See screenshot. Latin characters are replaced with fallback Unicode glyphs, but layout, colours, and Claude Code's UI elements all render correctly. Consistent with glyph cache / texture atlas corruption, not malformed output.
Key diagnostic observation
Selecting the garbled text forces a repaint of the highlighted region, which makes it readable. Releasing the selection often reverts the area to its garbled state.
Prior reports
Several similar reports have been filed over the past year, many closed without resolution. Happy to link them if it helps consolidate the investigation.