Style broken since alpha.21

[vtrphan]

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

Since v5.alpha.21 some of the styles are broken for me, like the Mini variant drawer
https://material-ui.com/components/drawers/#mini-variant-drawer

and also the Menu with MenuItem

Anyone else experiencing this problem? I think it is due to migration to emotion.
Is there a migration guide or some workaround to fix this?
I'll stay on v5.alpha.20 for the moment to avoid the problem.

Expected Behavior 🤔

No problem with the styles

Steps to Reproduce 🕹

Steps:

Context 🔦

Your Environment 🌎

`npx @material-ui/envinfo`

  Don't forget to mention which browser you used.
  Output from `npx @material-ui/envinfo` goes here.

[oliviertassinari]

Duplicate of #24109