MatAutocomplete Class attribute does not work

[joelbyrd]

Adding a Class attribute to a MatAutocomplete component according to the documentation is supposed to add your own custom CSS class to the DOM element. But it does nothing. I'm able to add other attributes like FullWidth="true" and that works, but adding Class="my-class" does nothing. Here's a BlazorFiddle sample: https://blazorfiddle.com/s/wsblkao3