Process - Arrows cover text and pictures

Hello! I'm having a strange issue using "Process" and was wondering if someone could help me.

When I create a process in a lesson (and preview it) the arrow buttons are located in an area where it doesn't interfere with the picture or text. 

Once I go out to preview the full course, the arrows are in front of the pictures and text. The only change is that I'm previewing it in two different areas. 

Does anyone have an idea on how to fix this? I've attached screenshots.

Thanks!