Overlapping text in toast with header created in a collection

Describe the bug

When creating a toast in a collection. Windows automatically adds a textual note "via Notification Visualizer" (name of the application).
When the toast contains a header. The same textual note "via..." is added on top of the header text. This makes it very difficult to read the header text.

Steps to reproduce the bug

1. Start Notification Visualizer app
2. Create a "sample" collection
3. Create a toast with the following

<toast>
  <header id="6289" title="Test header" arguments="header"/>
  <visual>
    <binding template="ToastGeneric">
      <text>This is a simple toast message</text>
      <text>With a header in a collection</text>
    </binding>
  </visual> 
</toast>

4. pop it

Expected behavior

Header text is fully visible and not overwritten.

Screenshots

NuGet package version

None

Windows version

Windows 11 (22H2): Build 22621, Windows 10 (21H2): Build 19044

Additional context

No response

Start by reproducing the toast from a sample collection in the Notification Visualizer app on the Windows versions listed, using the XML from the report. Compare the rendered header with the expected behavior and verify that the header text is fully visible without the application note overwriting it.