[BUG] Terminal color/highlighting corruption after prolonged session - may be due to communication in Czech

Bug description

After some time in a session, terminal syntax highlighting becomes corrupted.
Colors no longer respect word/token boundaries ÔÇö they bleed across characters randomly.
This affects both code blocks and regular prose in Claude's responses.

At the start of a session everything renders correctly. The corruption appears
after the session has been running for a while (exact time varies).

When asked, Claude confirmed the markup in its response is correct, pointing to
a rendering issue in the Claude Code terminal UI itself.

Steps to reproduce

1. Start a Claude Code session
2. Work for an extended period (multiple interactions)
3. Observe that syntax highlighting / text coloring gradually becomes corrupted

Expected behavior

Colors should stay within token/word boundaries throughout the entire session.

Environment

• Claude Code version: 2.1.42
• OS: Windows 10 Pro 10.0.19045
• Terminals tested: Windows Terminal, standalone console window
• Shells tested: PowerShell, cmd
• Behavior is consistent across all terminal/shell combinations