After Winget NETworkManager can't scan IP Addresses

**Describe your issue**:

Using Windows 11 Pro Powershell / winget to download the latest version of NETworkManager. After that update the "IP Scanner" hangs searching the network. This has been a problem for years.

**Steps to reproduce the issue**:

1. Start Powershell on Windows 11 Pro as Admin
2. enter "winget upgrade --all"
3. NETworkManager upgraded
4. Click desktop shortcut for NETworkManager
5. Click thru initial start screen
6. Click IP Scanner
7. IP scan starts and spinner appears forever

**NETworkManager version**: 2026.7.7.0

- [ ] Portable

**Windows version**:
Edition Windows 11 Pro
Version 25H2
Installed on ‎6/‎14/‎2026
OS build 26200.9168
Experience Windows Feature Experience Pack 1000.26100.344.0

**.NET version** (like 6.0.x): 4.8.1 SDK & Targeting Pack
4.8.09032 7/14/2026

**Screenshots**

NETwork Manaager hangs doing IP Scan.

Reproduce the hang from the reported Windows 11 Pro PowerShell steps, then start at the IP Scanner entry point and compare behavior before and after the winget upgrade. Done means the IP Scanner completes normally instead of leaving the spinner running indefinitely.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.