Scripted Content SandBoxing issue, And CFI pages position

[offers01]

1- In Epub.js showing multiple pages blank, But content in there pages i think contens are blocked. So please sugges any idea for this how to show all block contents.

2- Also i have facing issue with horizontal pages scrolling with position. If all contents align in vertically but we can show all content in horizontaly its create a all pages but only one chapter have one CFI. All horizontal pages same CFI position so we can not go to last page read.
So how we can manage this in single CFI in horizontally with multiple pages with new position.