Navigation Flow example crashing

[hawkerm]

Issue Type

[x] Bug Report
[ ] Feature Request
[ ] Sample request
[ ] Documentation issue or request
[ ] Other – Please describe:

Current Behavior

If you open the Navigation Flow sample and click on one of the items, the sample app crashes. An animation can be seen playing right before the app terminates.

Expected Behavior

App doesn't crash

Steps to Reproduce (for bugs)

1. Click Motion
2. Click on Navigation Flow
3. Click on any Item (scrolling doesn't matter)

Your Environment

Don't know Sample App Version, none listed in Samples, but just downloaded it fresh from Microsoft Store.

• Operating System build # : 20H2 19042.804

[hawkerm]

This doesn't seem to reproduce with #350 applied (in Debug or Release mode).

However, I notice some flickering of the container when navigating back from the item: