Here is my repository to show the problem.
https://github.com/musictopia2/CssIsolationNotWorking

What happens is the following:
If I have a base class that has css isolation that I want to expose to sub classes; then when the sub class tries to use it, ignores the css class. I hope there is a way to fix it. Because there are some cases where there may be css classes they want to expose to sub classes.