Text editor – family font doesn’t apply

Hello,

I’m have two issues.

1) Text editor – Family Font
When using a text editor, I go to Style -> Typography -> select ‘Montserrat’ as the family font.
For some text editors it works and strangely for other it doesn’t.
I don’t why I can adjust the font for some an for some not?

Here’s an example:
https://www.smarthome-comfort.com/en/shop-2/netatmo-smart-video-doorbell/
You see the font that won’t change in the section of “Access to all features with no subscription”

2) Edit H2
When trying to edit H2 in Theme Style -> Typography to another font/size etc. it doesn’t work.
After applying those changes I create a text editor, select in content H2 and it still applies the old H2 style

Thank you for assisting!