8/1 Update:
Thank you for your feedback. We have completed our investigation and have published an updated version of the Microsoft Store app which includes a fix for this issue. To install this update:
From the taskbar, open Microsoft Store. Select More ... > Downloads and updates > Get updates. Install available updates, including Microsoft Store version 11906.1001.24.0 (or later). For more help installing Microsoft Store updates, see Get updates for apps and games in Microsoft Store.
Greg