We refactored the patch to add tests for the resize feature. We were able to write test cases for the drag event by using spies and setting the rect dimensions. In cases like this, we can just test some components in order to have enough confidence in the code. So we isolated the function that implements the behavior of this feature and tested that it was performing as expected.
We ran the patch through the pipelines and all of the tests passed.
I'm consistently seeing the feature test failure below with this patch applied: