Text rendering bug - spaces/characters merged in terminal output

Description

When Claude outputs completion messages, spaces and characters sometimes get merged/corrupted in the terminal output.

Example

Expected:

- Task #1 - Lorem ipsum dolor sit
- Task #2 - Amet consectetur adipiscing
- Saved to .claude/knowledge/example.md

Actual:

- Task #1 - LoremIipsumdolor sit
- Task:#2 - Amet consectetur adipiscing
- Savedto .claude/knowledge/example.md

Pattern

• Random spaces disappear
• Characters get duplicated (e.g. 'Ii' instead of 'i')
• Colons appear in wrong places ('Task:#2' instead of 'Task #2')

Environment

• Claude Code CLI
• macOS Darwin 24.6.0
• Model: claude-opus-4-5-20251101