A recent update to the Android OS infrastructure resulted in notifications no longer being sent for Android users (notifications are being sent as normal via email, and on iOS).
We have now made an update to how Mixlr notifications are sent on Android which should solve this problem.
If you are still not receiving notifications on Android, please try unfollowing and then following again any channels for which you wish to receive live event notifications. If you are still having trouble after trying this please contact us.