I am using the Box app through my iPhone.
There is one problem... It's serious for me personally (to the point where I gave up on the box app...)
Open the Box app on your iPhone and open the Excel file saved inside.
First, move your finger up, down, left, and right to view the material.
However, since the screen is too small, I zoom in to view the document.
To zoom in on a document, use two fingers or the fingers of both hands to zoom in or out.
This is where the problem arises. When you zoom in or move the screen, the opened Excel document closes as soon as you try to move it even a little.
I thought about the reason, and it's because of the function that closes the running app when you pull down the document with your finger when closing the running app.
This problem did not occur in the past with the iPhone 16 Plus, but
This is a problem that occurs when using the Box app after replacing the iPhone 15 Pro.

As a workaround, in the past, you could open an Excel document and immediately enlarge the document with two fingers or the fingers of both hands.
Currently, it seems that in order to enlarge, you must touch the desired location in the document once with your finger. (This feature, which did not exist before, is actually very inconvenient)

In other words, you need to restore the function from using the zoom function after touching the screen to being able to use the zoom function right away without touching the screen.

Second, when closing an Excel document, you must change the document to close when you click the X in the upper left corner.
In other words, when using the scroll function to move the document down, the function must be modified so that the document does not close.

To be honest, I often use Excel documents to search for content.
If you use your finger incorrectly, the document closes immediately, which makes using the app quite burdensome (the document closes right away).
I even thought about giving up on the Box app due to the problem of not being able to use the Excel document search function.

Developers, have you never opened an Excel document through the Box app?
Give it a try and it will become clear what the inconveniences and problems are.
Please let me know if there is a method, plan, or development plan to solve this problem. Thank you and good luck...