Communication Sites – site text

I found an interesting issue and wanted to see if any of you know whats happening/ cause of this.
When creating communication site, the title, description and URL fonts are gray/white in color. I have customized the site design and choose Oslo with dark theme, for my root site collection. That should not have changed the styles for new communication sites as well should it?
Hmmm…me be curious if I caught a bug?
I think immaterial of the theme of parent site, site collections should have their own default font theme.

Here is what I saw,

font white comm

Any one else experiencing this?