Microsoft is pretty busy since last few days updating their stock apps for Windows 10. This time they push an update for the Windows Phone Store app. The app which now moves to version 2015.8.12.1, shows no major changes suggesting bug fixes and minor backend changes. It might be possible that Microsoft pushed this update for fixing nasty store issues which are faced by users.
Go to Store>Downloads>Check for updates to grab the latest update. If you have set for automatically download updates, then chances are the update is already up and installed on your device.
Let us know in the comments section if you spot something new in the latest release.
Thanks to Zapella T for the tip.