PowerToys Run: Sometimes Window walker returns no results

### Microsoft PowerToys version

0.100.2

### Installation method

Microsoft Store

### Area(s) with issue?

PowerToys Run

### Steps to reproduce

1. Open PowerToys Run
2. Open the Window Walker

### ✔️ Expected Behavior

Window walker returns the open windows all the time

### ❌ Actual Behavior

Window walker sometimes returns no results

https://github.com/user-attachments/assets/3bcfca4d-3c73-4663-bfea-c2e17071420b

### Upload Bug Report ZIP-file

_No response_

### Additional Information

_No response_

### Other Software

Any application?

Start by reproducing the issue with PowerToys Run and its Window Walker using the listed steps, then trace the Window Walker entry point and window enumeration behavior. Done means Window Walker consistently returns the open windows instead of intermittently showing no results.

Written by the indexing model from the issue text.