Props not loading in Canvas tab of .MDX stories

[jeredsloof]

Describe the bug
Props passed by .MDX stories are succesfully loaded in the Docs tab, but are not loaded in the Canvas tab.

To Reproduce
Repro: https://www.chromatic.com/library?appId=623432469a808c003aec445c
Repository: https://github.com/jeredsloof/storybook-repro

System
Environment Info:

System:
OS: macOS 11.6.4
CPU: (4) x64 Intel(R) Core(TM) i3-8100B CPU @ 3.60GHz
Binaries:
Node: 16.14.0 - /usr/local/bin/node
Yarn: 3.2.0 - /usr/local/bin/yarn
npm: 8.3.1 - /usr/local/bin/npm
Browsers:
Firefox: 98.0.1
Safari: 14.1.2
npmPackages:
@storybook/addon-actions: ^6.5.0-alpha.49 => 6.5.0-alpha.49
@storybook/addon-docs: ^6.5.0-alpha.49 => 6.5.0-alpha.49
@storybook/addon-essentials: ^6.5.0-alpha.49 => 6.5.0-alpha.49
@storybook/addon-links: ^6.5.0-alpha.49 => 6.5.0-alpha.49
@storybook/vue3: ^6.5.0-alpha.49 => 6.5.0-alpha.49

[shilman]

We’re cleaning house! Storybook has changed a lot since this issue was created and we don’t know if it’s still valid. Please open a new issue referencing this one if:

• this is still a problem in SB 7.x
• you can provide a consistent reproduction in 7.x (at https://storybook.new/ or per repro docs).