Flow event 'fileRetry' is not being fire

[dustydang-tyler]

I wanted to use the event 'fileRetry' to track retry upload for failed file uploads. However, from what I see, the event is not being fire at all. It seemed like the functionality is working fine, but no event is being fire:

https://stackblitz.com/edit/ngx-flow-example-a79711?file=src%2Fapp%2Fapp.component.ts