Sorry for the troubles you've had with the app. We'd be happy to take a look into this for you, please contact us at yammer-android-store@microsoft.com. Thank you.
Thank you for taking the time to share your experience, we understand how frustrating this can be. Our team is dedicated to ensuring that our app works smoothly for all users. Please try updating your app to the latest version and if the issue persists, please let us know so we can get in contact. We appreciate your patience and understanding.