• .NET Core Version:
  .Net SDK 6.0.100-alpha.1.20623.10

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

More info:
This is a regression issue, cannot repro earlier 6.0 build, regression from the fix of pull: 4185

Minimal repro:

1. Create a Winforms .Net Core app with targeting 6.0
2. Add 2 comboBox controls with several items, and set their DropDownStyle property to DropDown, Simple separately
3. Check related Value pattern and Text pattern in Inspect for ComboBox Edit part, and in Narrator, check its behavior

Actual behavior:
In Inspect, LegacyIAccessible.Name IsTextPattemAvailable, IsTextPattem2Available, IsValuePattemAvailable properties are changed, and Missing Value.IsReadOnly, Value.Value, IsContentElement properties

In Narrator, it cannot announce comboBox edit part

Expected behavior:
In Inspect, it supports ValuePattern and TextPattern for comboBox edit element

In Narrator, it can announce comboBox edit part.