Custom CSS applied to a class sometimes doesn’t appear in the custom CSS area. To make it show up, you need to deselect and then reselect the class. Watching the video below, you would notice i had the class selected and the style indicator was showing on the custom css box indicating the presence of custom css but it was showing until i toggled selection of the class. This happens randomly especially when there are lots of elements on the page
Hi @emmanuelson,
thank you for your report. I tested on a very long page but was unable to reproduce this error.
Do you see any errors in the console, when this happens? Also, what is your plugin stack, maybe would be worth checking, if there are any conflicts there.
We would like to investigate this, so would you be so kind as to send temporary login credentials and a link to this thread to help@bricksbuilder.io using the email address you used during the purchase? Please, also try to include as much info about how to reproduce this error as reliably as it can be. 
Thank you and best regards,
M
I unfortunately didn’t check the console but i will do so when it occurs again.
The plugins stack is BricksExtras, Automatic.css, Advanced Custom Fields & WPCodeBox 2
I will send the email once it occurs again and i have the relevant information as requested.
Thank you. All seems fine.
Please, let us know once you have more relevant info and we will take a look.
Best regards,
M