Subsequent Keyboards Shortcuts require release/repress of modifier keys

### Microsoft PowerToys version

0.98.1

### Installation method

Other (please specify in "Steps to Reproduce")

### Area(s) with issue?

Keyboard Manager

### Steps to reproduce

I want to remap Alt Gr+K to "{" and Alt Gr+L to "}".

Settings in Keyboard Manager:
Ctrl (Left) Alt (Right) K inserts {
Ctrl (Left) Alt (Right) L inserts }

### ✔️ Expected Behavior

Holding Down Alt Gr and pressing kl while Alt Gr is pressed inserts {}

### ❌ Actual Behavior

Holding Down Alt Gr and pressing kl while Alt Gr is pressed inserts {l
Holding Down Alt Gr and pressing k, releasing and repressing Alt Gr and then pressing l inserts {}

### Upload Bug Report ZIP-file

_No response_

### Additional Information

OS Version: Microsoft Windows NT 10.0.26200.0
.NET Version: .NET 9.0.14
PowerToys is running as user (non-elevated)
Install scope: per machine (system)
Operating System Language: English (United States)
System locale: en-US

### Other Software

_No response_

Start in Keyboard Manager and reproduce the Alt Gr mapping from the issue on Windows. Trace how modifier state is handled across successive key presses; done means pressing k and l while holding Alt Gr inserts both { and } without releasing or repressing the modifier.

Written by the indexing model from the issue text.