Code In Pagebuilder Pages

Hello! I have a problem.
I create my page layout withpage builder. After I used the widget “Site Origin Editor” to upload a picture and change the code, because I want on the picture a mouse over effect.

For example:

When I make preview everything is perfect.
The problem is when I save. My code changings don’t save and I don’t know why.
Is there an explanation?
I am waiting for an answear.

Thank you so much