[Accessibility][ScreenReader]: NVDA/Narrator are not reading the ToolTip message

[vladimir-krestov]

• .NET Core Version: 3.1.0-preview1.19458.7
• Have you experienced this same bug with .NET Framework?: Yes

Original bug:

• Bug 987952

Problem description:

• A user can't hear a tooltip text using NVDA/Narrator

Actual behavior:

• NVDA/Narrator don't read a message from shown ToolTip

Expected behavior:

• NVDA/Narrator should announce ToolTip text
  

Minimal repro:

• Create .Net Core app
• Add some control and ToolTip
• Connect the control with the ToolTip
• Run the test app and NVDA/Narrator
• Listen what NVDA/Narrator say

Test app:

• [Core][NVDA]ToolTipError.zip

[Lydia-Shi]

Verified the issue with .NET Core 3.1 Preview 3 -014638 build, the issue has been fixed, narrator can read tooltip message. Please see the below screenshot: