GSuite Support sent out the following notice:
From April 17, 2019, any new classes created in Classroom will experience new ordering rules on the Classwork page. New topics or items posted to the Classwork page in these new classes will start to appear at the top of the page instead of the bottom. We have made this change to improve the user experience of Classroom based on teacher and professor feedback. This feature will not be supported by versions of the mobile app which are older than 2.2019.06301 on iOS and 5.2.102.04xx on Android.
What does this mean for my organization?
Users running mobile versions of the Classroom app older than the above mentioned versions will not see the order they set on Classroom web for their Classwork pages in new classes within the mobile apps. Additionally, assignments posted via these older mobile app versions, will not post to the top of the page.
What do I need to do?
To ensure both teachers and students have a consistent experience across Classroom web and mobile, please let your teachers, professors, and students know about this feature, and encourage them to update their personal devices to the latest version of the Classroom mobile apps as soon as possible.