[Bug] Claude Code generates repetitive "mass" output instead of intended text

Bug Description
For some reason, keeps outputting "mass" and "mass mass mass". It seems to replace words with "mass". One funny thing is that Claude, during generation of the text, sees that he outputs "mass" and gets frustrating over it and swears. "Damn, i wrote mass again, why? Let me try again xxxxxxx".

" I GIVE UP "break" becomes "mass". "brick" becomes... no, that works? But "break"
does not work.

Can you write the word "break" to me so I can see that I'm not crazy? "

This is probably a hiccup in the model and not Claude code though.

Environment Info

• Platform: linux
• Terminal: ghostty
• Version: 2.1.14
• Feedback ID: b90fd534-a156-4d61-ad67-43cb59bd51b0

Errors

[{"error":"Error: ENOENT: no such file or directory, scandir '/etc/claude-code/.claude/skills'\n    at readdirSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:1903)\n    at HJ (/$bunfs/root/claude:11:34695)\n    at readdirSync (/$bunfs/root/claude:12:1864)\n    at cX$ (/$bunfs/root/claude:1463:380)\n    at cX$ (/$bunfs/root/claude:1463:1350)\n    at <anonymous> (/$bunfs/root/claude:1463:4440)\n    at <anonymous> (/$bunfs/root/claude:1463:5171)\n    at A (/$bunfs/root/claude:11:7245)\n    at YG1 (/$bunfs/root/claude:4094:4342)","timestamp":"2026-01-20T23:14:29.364Z"},{"error":"Error: LSP server plugin:typescript-lsp:typescript failed to start: Executable not found in $PATH: \"typescript-language-server\"\n    at start (/$bunfs/root/claude:1533:22298)\n    at async f (/$bunfs/root/claude:1533:24750)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-20T23:14:29.706Z"},{"error":"Error: LSP server plugin:rust-analyzer-lsp:rust-analyzer failed to start: Executable not found in $PATH: \"rust-analyzer\"\n    at start (/$bunfs/root/claude:1533:22298)\n    at async f (/$bunfs/root/claude:1533:24750)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-20T23:14:29.706Z"},{"error":"Error: Executable not found in $PATH: \"typescript-language-server\"\n    at spawn (unknown)\n    at spawn (node:child_process:669:35)\n    at spawn (node:child_process:14:39)\n    at start (/$bunfs/root/claude:1533:20843)\n    at start (/$bunfs/root/claude:1533:22352)\n    at f (/$bunfs/root/claude:1533:24750)\n    at f (/$bunfs/root/claude:1533:25725)\n    at L (/$bunfs/root/claude:1533:32512)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-20T23:14:29.707Z"},{"error":"Error: Executable not found in $PATH: \"rust-analyzer\"\n    at spawn (unknown)\n    at spawn (node:child_process:669:35)\n    at spawn (node:child_process:14:39)\n    at start (/$bunfs/root/claude:1533:20843)\n    at start (/$bunfs/root/claude:1533:22352)\n    at f (/$bunfs/root/claude:1533:24750)\n    at f (/$bunfs/root/claude:1533:25725)\n    at L (/$bunfs/root/claude:1533:32512)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-20T23:14:29.707Z"},{"error":"Error: Failed to start LSP server plugin:typescript-lsp:typescript: Executable not found in $PATH: \"typescript-language-server\"\n    at <anonymous> (/$bunfs/root/claude:1533:32534)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-20T23:14:29.707Z"},{"error":"Error: Failed to start LSP server plugin:rust-analyzer-lsp:rust-analyzer: Executable not found in $PATH: \"rust-analyzer\"\n    at <anonymous> (/$bunfs/root/claude:1533:32534)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-20T23:14:29.707Z"},{"error":"Error: ENOENT: no such file or directory, scandir '/etc/claude-code/.claude/skills'\n    at readdirSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:1903)\n    at HJ (/$bunfs/root/claude:11:34695)\n    at readdirSync (/$bunfs/root/claude:12:1864)\n    at cX$ (/$bunfs/root/claude:1463:380)\n    at cX$ (/$bunfs/root/claude:1463:1350)\n    at <anonymous> (/$bunfs/root/claude:1463:4440)\n    at <anonymous> (/$bunfs/root/claude:1463:5171)\n    at A (/$bunfs/root/claude:11:7245)\n    at YG1 (/$bunfs/root/claude:4094:4342)","timestamp":"2026-01-20T23:19:15.625Z"},{"error":"Error: Request was aborted.\n    at makeRequest (/$bunfs/root/claude:884:3940)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-20T23:28:18.865Z"}]