GitHub issue #29937 in anthropics/claude-code, opened 2026-03-02 by efloehr, records a report that during normal Claude Code sessions in tmux the terminal rendering becomes corrupted, with text from different parts of the session overlapping and overwriting each other on the same lines so the interface becomes unreadable, that the corruption persists until the session is restarted, and that the only reliable fix is /clear or restarting the session.
Verbatim Excerpts from Cited Records
“During normal Claude Code sessions in tmux, the terminal rendering becomes corrupted.”
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anthropics/claude-code (issue 29937 opening body, Bug Description section)
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2026-03-02T00:32:40Z
·GitHub Issue ↗
“Text from different parts of the session (code output, permission prompts, previous responses) overlaps and overwrites each other on the same lines, making the interface unreadable.”
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anthropics/claude-code (issue 29937 opening body, Bug Description section)
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2026-03-02T00:32:40Z
·GitHub Issue ↗
“The corruption persists until the session is restarted.”
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anthropics/claude-code (issue 29937 opening body, Actual Behavior section)
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2026-03-02T00:32:40Z
·GitHub Issue ↗
“Only reliable fix is `/clear` or restarting the session.”
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anthropics/claude-code (issue 29937 opening body, Workaround section)
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2026-03-02T00:32:40Z
·GitHub Issue ↗
Counter-record: Issue remains open with 29 comments as of 2026-11-04. Surveyed comments confirm the symptom across tmux with alacritty, iTerm2, Ghostty, WezTerm and the VS Code integrated terminal on Linux and macOS from March through November 2026, with the latest surveyed comment (2026-11-04) still experiencing it under the COSMIC terminal. Workaround reports conflict: some commenters say Ctrl+L or a resize redraw recovers the display temporarily, while the reporter and others say neither Ctrl+L nor redraw fixes it; a vim-mode trigger hypothesis raised in June 2026 is contested by commenters in standard mode. No maintainer resolution appears in the surveyed thread. The claim documents only the original report, not a verified current state.
Falsification probe: If issue 29937 is deleted without archive, if the author edits the opening body so the quoted sentences no longer match verbatim, or if the author posts a retraction of the report, this claim drops to Withdrawn.
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