• .NET Core Version:
  .Net 6.0.100-alpha.1.20516.5

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

More info:
This issue cannot repro on .Net Core 3.1.

Minimal repro:

1. Create a .NET Core project with a Label control and change the text to ‘numericUpDown’.
2. Add a NumericUpDown control to form.
3. Build and run the core project.
4. Open the Inspect tool and observe the NumericUpDown control on MSAA mode.

Or

1. Extract the “MSAA_Numeric&Domain.zip” and open it in VS.
   MSAA_Numeric&Domain.zip

2. Build and run the core project.

3. Open the Inspect tool and observe the NumericUpDown control on MSAA mode.

Actual behavior:
The MSAA structure of NumericUpdown/DomainUpDown in Core is missing some children nodes.

Expected behavior:
The MSAA structure of NumericUpdown/DomainUpDown in Core is correct, it should be like Core 3.1: