The latest update was just a security patch and did not include the notification update. Unless you received something different or manually installed it.
Holy cow! I have the Droid Edition Z and and downloaded the latest update and it resolved the low notification issue!!
Holy cow! I have the Droid Edition Z and and downloaded the latest update and it resolved the low notification issue!!
As close to the source as we can get says nothing was included in the Moto Z Droid build to address the low notification issue.
https://forums.lenovo.com/t5/Moto-Z-Force/Quiet-notifications-moto-z/m-p/3524088#M3148