Excel Files truncated in Box for Android

I have a basic XLS spreadsheet with mostly text data created on Windows 10. Box for Android is cutting off the last 3 or more rows when I view the worksheet on my Android device using Box fo Android. It is not consistent. My first woksheet it shows all 57 rows that contain text. The 2nd worksheet stops on row 44. 3rd worsheet is stops on row 25...