MSIX version tearing causes instability and crashes

This bug represents a class of issues with the MSIX platform running mixed versions of our package at the same time. This violates fundamental assumptions of our code and causes instability and crashing in a variety of ways.
We are pursuing this issue internally with the MSIX platform, but this main bug will represent any other issues that get root-caused to this situation.

The issue provides no file, test, or entry point. Begin by reviewing the described MSIX mixed-version behavior and the project's internal investigation; completion would require an identified root cause and a verified fix for the resulting instability and crashes.

Written by the indexing model from the issue text.