The keyboard manager always lose efficacy when use for a long time

### Microsoft PowerToys version

0.100.1(latest). For earlier version, this bug exists either.

### Installation method

PowerToys auto-update

### Area(s) with issue?

Keyboard Manager

### Steps to reproduce

When using Keyboard Manager, it always lose efficacy when use for a long time。I set a lot of ALT+ALAPHA combination key, apply to specific application. It always work fine at beginning, however, it always suddenly fails and cannot be restored (neither restarting powertoys nor re-enabling the keyboard manager function), which manifested in the fact that when I was using the specific application I had set, it did not block some shortcut keys (triggering the logic of the application itself or that of other applications). **But it may recover after a few minutes/hours.**

### ✔️ Expected Behavior

work fine for a long time

### ❌ Actual Behavior

The keyboard manager always lose efficacy when use for a long time（maybe 10min or longer）

### Upload Bug Report ZIP-file

[PowerToysReport_2026-06-25-16-49-27.zip](https://github.com/user-attachments/files/29330690/PowerToysReport_2026-06-25-16-49-27.zip)

### Additional Information

Win11
Language：Chinese

### Other Software

_No response_

Start with the attached PowerToysReport ZIP and reproduce the failure using Keyboard Manager with several application-specific ALT combinations on Windows 11. Compare behavior before and after it stops blocking shortcuts, including after restarting or re-enabling the manager; done means the mappings remain effective during prolonged use.

Written by the indexing model from the issue text.