A11y_.NETCore3.0(Win Forms and CoreSDK)_TreeView_Screenreader: NVDA is not announcing tree view items properly.

[mspatil110]

Repro Steps:​

1.Launch Core testing project and press F5.
2. Navigate to "common controls_2: Testing the control under common control tab" and hit enter.
3. Start NVDA.

4.Verify that NVDA is announcing tree view items properly or not.

Actual:

NVDA is announcing the tree view item Node0 collapsed 1 of 1 and Node3 collapsed 1 of 1.

Note: Narrator is announcing the tree view items properly like
Node0 collapsed 1 of 2 and Node3 collapsed 2 of 2.

Expected:

NVDA should announce the tree item like Node0 collapsed 1 of 2 and Node3 collapsed 2 of 2.

User Impact:

Screen reader only users will face difficulty to understand the tree view items properly

[LeonarddeR]

This most likely has the same underlying issue as #7041.

[michaelDCurran]

Closing on request from reporter privately by email.