MarkdownTextBlock throw ArgumentException while rendering link with code text

[Tlaster]

Describe the bug

Try rendering markdown like this

[`code`](https://github.com/)

And the MarkdownTextBlock throw ArgumentException

Steps to Reproduce

Steps to reproduce the behavior:

1. Open Sample App
2. Open MarkDownTextBlock sample
3. Add the following markdown to the textbox at the top:

[`code`](https://github.com/)

4. Sample App crash

Expected behavior

MarkdownTextBlock render like this:
code

Environment

NuGet Package(s): 
6.0.0
Package Version(s): 
6.0.0

Windows 10 Build Number:
- [ ] Fall Creators Update (16299)
- [ ] April 2018 Update (17134)
- [ ] October 2018 Update (17763)
- [x] May 2019 Update (18362)
- [ ] Insider Build (build number: )

App min and target version:
- [ ] Fall Creators Update (16299)
- [ ] April 2018 Update (17134)
- [x] October 2018 Update (17763)
- [ ] May 2019 Update (18362)
- [ ] Insider Build (xxxxx)

Device form factor:
- [x] Desktop
- [ ] Xbox
- [ ] Surface Hub
- [ ] IoT

Visual Studio 
- [ ] 2017 (version: )
- [x] 2019 (version: 16.4.4) 
- [ ] 2019 Preview (version: )

[ghost]

Hello Tlaster, thank you for opening an issue with us!

I have automatically added a "needs triage" label to help get things started. Our team will investigate the issue and help solve it ASAP. Other community members may also look into the issue and provide feedback 🙌

[Kyaa-dost]

@Tlaster I am not able to reproduce. Can you please show a screenshot or a screen record that displays the following [code] (https://github.com/) is crashing the Sample APP?

[Kyaa-dost]

The issue might be related to #3120 except in that scenario [ ] (https://www.google.com/) is crashing the app.

[ghost]

This issue has been marked as "needs attention 👋" due to no activity for 15 days. Please triage the issue so the fix can be established.

[ghost]

This issue has been marked as "needs attention 👋" due to no activity for 15 days. Please triage the issue so the fix can be established.

[yoshiask]

I just tried this in version 6.0.0 of the Sample App, and it does not crash. However, as long as a code block is contained in a link, the MarkdownTextBlock is not updated.

EDIT: Note that I'm using it from the Store, which may have an effect on whether or not the app actually crashes. Either way, there's still unusual and unexpected behavior here.