26.616 new desktop home view breaks session history display with custom model_provider (LiteLLM)

App Version: 26.616.30709
Previous working version: 26.609.30741
Platform: macOS (Apple Silicon)
Subscription: ChatGPT Enterprise

What happened

After auto-updating from 26.609 to 26.616, the session sidebar is completely empty.
All 71 sessions are intact on disk but not displayed in the UI.

What I expected

Session history visible in sidebar as before the update.

Steps to reproduce

1. Use a custom model_provider = "litellm" in ~/.codex/config.toml
2. Auto-update from 26.609 → 26.616
3. Relaunch Codex — sidebar is empty

Confirmed data is intact

cat ~/.codex/session_index.jsonl | wc -l
# returns: 71

ls ~/.codex/sessions/2026/06/
# returns: 02 03 04 09 10 11 12 13 14 15 16 17 18

Config (relevant parts)

model          = "litellm-gpt-5.5"
model_provider = "litellm"
sandbox_mode   = "workspace-write"

Attempted fixes (none resolved)

• rm -rf ~/Library/Application\ Support/Codex
• rm -rf ~/Library/Caches/com.openai.codex
• rm -rf ~/Library/Preferences/com.openai.codex.plist
• rm -rf ~/Library/Saved\ Application\ State/com.openai.codex.savedState
• Deleted state_5.sqlite files
• Downgrade not possible — 26.609 not available for download

Suspected cause

The new desktop home view and session entry flow introduced in 26.616
appears to fail silently when model_provider is set to a non-OpenAI
provider, preventing session history from rendering.