Hi @Urs Enzler ,
50MB is not a supported value for a Standard S3 database. Azure SQL Databases cannot be created in any random size in the supported range, they must be a specific value. The available values for DTU-based databases are specified here: https://learn.microsoft.com/en-us/sql/t-sql/statements/create-database-transact-sql?view=azuresqldb-current&tabs=sqlpool#arguments-1
If 50MB was working before, that was some kind of service anomaly. Rejecting 50MB is the correct behavior.
However, I was testing earlier today and I noticed that 250MB is also not working even though it's supposed to be supported. I will check whether this is a documentation issue (and it is really not supposed to be supported) or whether it's a service code issue.