[BUG] Persistent UI rendering glitches during chat output and text editing
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
There is a persistent rendering issue in the Claude Code interface when running on Windows Terminal. The UI fails to render text correctly, resulting in garbled output, overlapping text, and visual artifacts.
This glitch occurs not only when editing input (typing "/" and using backspace) but also actively during the chat rendering process when Claude generates responses. The /clear command is also unable to properly wipe the screen or fix these artifacts.
What Should Happen?
The terminal should render text cleanly without visual corruption, both during chat streaming and user input. The screen should update correctly, and the /clear command should wipe all previous content, restoring a clean prompt.
Error Messages/Logs
Steps to Reproduce
Scenario A (Chat Rendering):
Initiate a conversation or run a command that triggers a long response from Claude.
Watch the terminal as Claude renders the text stream.
Observe that the display becomes corrupted or fails to refresh cleanly, leaving glitched artifacts.
<img width="1262" height="642" alt="Image" src="https://github.com/user-attachments/assets/3af59611-cb2d-426b-a0f5-8b0ed1bfa255" />
Scenario B (Text Input):
Type the "/" character to open the command menu.
Press Backspace repeatedly to delete the character.
Observe the visual corruption on the current line.
<img width="1262" height="642" alt="Image" src="https://github.com/user-attachments/assets/51fe5e57-103d-42da-8853-1c38ac2a3ec6" />
Scenario C (Clear Command):
When the screen is in a glitched state, type /clear.
Observe that the terminal does not clear completely.
<img width="1262" height="642" alt="Image" src="https://github.com/user-attachments/assets/3a3c3935-f679-4945-9d2a-b67514a4bfda" />
Claude Model
Other
Is this a regression?
Yes, this worked in a previous version
Last Working Version
npm version
Claude Code Version
v2.1.19
Platform
Other
Operating System
Windows
Terminal/Shell
Windows Terminal
Additional Information
_No response_
5 Comments
Found 3 possible duplicate issues:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
This issue persists in v2.1.19 as well. See #20784 for details on WSL2 Ubuntu 22 and Windows 10 CMD environments.
Closed by this version change change:
https://github.com/anthropics/claude-code/blob/main/CHANGELOG.md#2127
Please update current stable version (2.1.17) to fixed version (2.1.27)
This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.