Auto overlay set PWD Variable error

Describe the bug

Auto overlay set PWD Variable error

How to reproduce

1. Define config

let-env config = ($env.config | upsert hooks.env_change.PWD [
        {
            condition: {|_, after|
                ($after | path join mod.nu | path exists )
            }
            code: "overlay use mod.nu;let-env overlay_path = ($after);let-env PROMPT_INDICATOR = $'(ansi purple_bold)($after | path basename)(ansi reset) > '"
        }
        {
            condition: {|before, after|
                ($before != null and $after != null and $env.overlay_path not-in $after
                    and $env.overlay_path in $before
                    and 'mod' in (overlay list))
            }
            code: "overlay hide mod --keep-env [ PWD ];let-env PROMPT_INDICATOR = ''"
        }
    ])

2. Create mod.nu file.
3. Enter workplace ,trigger overlay.
4. Exit workplace
5. Re-enter workplace ,PWD error!

Expected behavior

fixed.

Screenshots

Configuration

Additional context

No response

Reproduce the Windows failure using the configuration and numbered steps in the issue, focusing on the PWD environment-change hooks and overlay use/hide sequence. The issue is done when re-entering the workplace after exiting no longer produces the PWD variable error.