claude code is very slow to take in keyboard input.

Bug Description
claude code is very slow to take in keyboard input.
I'm using the windows native version (git bash) in vscode at the moment but I get the same behavior in windows terminal.
It's not only slow, that would be fine. but it also drops characters on a regular basis.

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 2.0.22
• Feedback ID: d6b821ba-a1ab-42c5-afda-aa0ca60421eb

Errors

[{"error":"Error: 401 {\"type\":\"error\",\"error\":{\"type\":\"authentication_error\",\"message\":\"OAuth authentication is currently not supported.\"},\"request_id\":\"req_011CUHxo7CGQc89q8irSoiuY\"}\n    at E4.generate (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:203:83082)\n    at Jy.makeStatusError (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:357:2117)\n    at Jy.makeRequest (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:357:5330)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async BTQ.Ao1.model (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3310:18707)\n    at async Ao1 (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2650:39781)\n    at async BTQ (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3310:18875)\n    at async file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3310:12822\n    at async ba0 (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3310:4494)\n    at async Nm (file:///C:/Users/timoch/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3310:12793)","timestamp":"2025-10-20T06:17:32.424Z"}]