[Bug] docgen works with start-storybook but not build-storybook

[kedarv]

Describe the bug

When I invoke start-storybook, my component's props are extracted correctly and the Description/ArgsTable are populated correctly. When I invoke build-storybook with the same configuration used in start-storybook, it fails and no inputs are found.

Is there something that would result in these different behaviors when building for production vs dev server? Interestingly, our configs seem to work fine for both building and dev server with TypeScript components - but Flow typed components seem to only work when using the dev server