Can't change text by custom class

I Need Help
1

I can’t change the characteristics of any text (size, font, color, etc) by creating a custom class for that text. The sidebar parameters always prevail and nothing changes.

It is exactly the same problem described in this forum post: Text size confusion
I also attach a link to a screencast: text custom class error - YouTube

I’m a user of Blocks 4.0.4, which is where this error occurs, but I just downloaded the beta 4.1 version and it hasn’t been fixed.

2

I seem to remember having this problem in v3, and I think I narrowed it down to not being able to override the h tag settings made in the document setup window.