[Zubersoft]

You have not provided the version of MobileSheets that you are using. If you have not updated to version 3.8.38, that should resolve most of the issues that have come up over the last few weeks. Just open the Microsoft Store, search for MobileSheets and tap the update button on the store page. You can check your current version by loading MobileSheets, tapping the three dots at the top right, then Settings->About. If you are experiencing issues with version 3.8.38, then please let me know exactly what actions are causing the crash to occur. I have a Surface Pro X myself and can test these things, but I have not experienced any crashes with the latest update. I have also checked the reported crashes for 3.8.38 through Microsoft AppCenter and see very few crashes, and none related to normal use of the application.

Thanks,
Mike