Salesforce Integration - Custom Tab makes you drag the cloud

When you install the integration between Salesforce and Box, it gives you a new tab in Salesforce called "Box Files". When you go to this tab, it goes directly to your box home screen.You do not have to the security thing, where you drag the cloud, which is nice.

I made a custom tab in Salesforce to go to a specific box folder, and embedded the box link into the tab. It works. BUT, every time you go to the tab, it gives you the security thing, where you drag the cloud. This is annoying to do it every time, even just switching tabs and coming back makes you do it again.

Followed these instructions:

https://support.box.com/hc/en-us/articles/***number removed for privacy***-Box-for-Salesforce-Custom-Tabs?mobile_site=true

How can I make my custom tab work like the Box Files tab that comes with the integration, where it doesn't ask you to drag the cloud? Or maybe make it only ask you once per session?

I see someone asked a similar question about a year ago, with no resolution:

https://community.box.com/t5/Box-Developer-Forum/Box-Embed-widget-amp-Box-for-Salesforce-widget-require-cloud/td-p/22916