Crash doing /update or /restart before any prompts

[chjo-ms]

Describe the bug

Copilot can't load the previous session and errors after a /restart or /update.

Affected version

GitHub Copilot CLI 1.0.51

Steps to reproduce the behavior

1. Launch copilot
2. Type /update or /restart as the first thing you do
3. Copilot errors / crashes unable to load previous session

Expected behavior

Copilot loads previous session and carries on after /restart or /update

Additional context

Version 1.0.51
We use local sessions not github.