Yes i have received this email :
"Your Business Central failed to update
Business Central failed to be updated. The reason for the failure is being determined. You will receive another notification when the update has been rescheduled."
Your service identifier (Tenant): XXXXXXX
Environment: Production
Version before update: 13.5.29483.0
Version after update: 14.0.29537.29654
Scheduled date: 5/4/2019 (UTC)
But there is no help in knowing why it failed