• .NET Core Version:
  .NET SDK 5.0.100-rc.1.20377.3

• More Info:
  This is not a regression issue, it also reproduce on .NET Core 3.1.

• Have you experienced this same bug with .NET Framework?:
  No

Problem description:
When setting ComboBox's DropDownStyle as DropDown or DropDownList, the list item of comboBox doesn't display below Form1 window node, it incorrectly displayed below Desktop1 panel node.

Expected behavior:
The list items of comboBox's UIA hierarchy should display below Form1 window node.

Minimal repro:

1. Launch Inspect tool.
2. Create WinForms core project with a comboBox control.
3. Set the DropDownStyle property of comboBox as DropDown or DropDownList.
4. Run the project.
5. Focus on the list items of comboBox, then observe the UIA hierarchy in inspect tree.