[Bug]: Loading @emotion/react more than once

[vanessayuenn]

Describe the bug

Project: MealDrop
Version: 8.0.0-alpha.4
Bug/feedback:

When loading any MDX (docs only or autodocs) in Storybook 8.0.0-alpha-4 or higher, there is a warning in the console mentioning that emotion is loaded multiple times:

You are loading @emotion/react when it is already loaded. Running multiple instances may cause problems. This can happen if multiple versions are used, or if multiple builds of the same version are used.

Apart from emotion being instantiated by the Manager UI, there are two moments where it gets instantiated in the Preview UI:

Via @storybook/components

Via @storybook/addon-docs/node_modules/@storybook/components

To Reproduce

1. Go to https://github.com/yannbf/mealdrop/tree/bug/multiple-instances-emotion
2. Run Storybook
3. Check the logs

System

No response

Additional context

No response

[JReinhold]

I have a fix for this, but I think it's highly related to #25737 so I'm trying to fix both.