Blog Style Advanced Layout Editor

After 4 hours of search I give up. I have created a page (called blog). The page contains the content element “blog posts”. Under Enfold Theme Option in “And where do you want to display the Blog?” is have selected the page “blog”. Under General Settings in “Blog Style” I have selected “Use the advanced layout editor …”. Everything is saved.

As soon as i reload the page my custom css settings for fonts size get ignored. If i switch back to one of the other default styles (e.g. grid) my custom css settings are applied again.

I use “Simple Custom CSS” plugin for a long time and never had any issues. The stylesheet is linked within the source code as usual:
<link rel='stylesheet' id='sccss_style-css' href='https://www.mydomain.xxx/?sccss=1&ver=3.8.1' type='text/css' media='all' />
If I call the link i get displayed my custom css setting
body {font-size: 17px !important; line-height: 1.6em !important; font-weight: normal !important; }
(actually it is much more than this line but that does not matter for now)

If I change the blog style back to “Use the advanced layout editor …”, reload the page and view the source code i still see my custom stylesheet
<link rel='stylesheet' id='sccss_style-css' href='https://www.mydomain.xxx/?sccss=1&ver=3.8.1' type='text/css' media='all' />
However if I open that link again in a browser I get displayed the blog page of my site.

If I move my custom css to the custom.css file from my child theme or to the quick css field in the styling section everything works.
However i dont like that approach because the quick css field is to small and the custom.css is makes things complicated. I like to have all custom css settings at one place.

I have searched through the enfold source code to see what prevents the sccss file from getting loaded if one selects the advanced layout editor. But I cant find it (or I am to tired).

Can you please check what is going on? This seems to be a bug.

regards

Michael