Production styling is broken

[mdvanes]

I tried to set a custom name generator, but that does not fix it: https://material-ui.com/styles/api/#creategenerateclassname-options-class-name-generator

Seems to be related to mui/material-ui#18197

However, when the plugin is enabled (it used to be), it seems the theme overrides (theme.ts) are working but the custom styles e.g. backgroundSize cover in MainFeaturedPost are ignored.

When navigating to a specific blog post, refreshing, and returning to the home/blog overview page, the styles do work.