Split Button: Not able to perform tab/shift-tab navigation after performing Bold/Italic/Underline operation in edit box

[stmoy]

Describe the bug

Steps to reproduce the bug

1. Steps to reproduce the behavior:
2. Launch XAML Controls Gallery.
3. Activate Split button from All controls page.
4. Take the keyboard focus to the rich edit box, press ctrl+a to select the text, then press ctrl+b/i/u.
5. Now press tab/shift-tab and observe.

Expected behavior

User should be able to navigate in the page after performing Bold/Italic/Underline context menu operation.

Actual behavior

• Keyboard focus gets struck.
• The application doesn't respond to tab/shift-tab.
• Not able to regain focus with alt+tab too.

Screenshots

Version Info

Gallery version (found on Settings page):

1.2.9.0

Windows 10 version:

• Insider Build (xxxxx)
• May 2019 Update (18362)
• October 2018 Update (17763)
• April 2018 Update (17134)
• Fall Creators Update (16299)
• Creators Update (15063)
• Anniversary Update (14393)

Device form factor:

• Desktop
• Mobile
• Xbox
• Surface Hub
• IoT

Additional context

Jevan mentions: It works, but after doing this then tab/shift+tab is very slow. I suspect a perf issue in the app. Maybe a runaway callback?