I'm trying to deploy a runnable Spring Boot jar via Heroku CLI.
On 2018-11-06 it was sufficient to define the java.runtime.version=11 Config Var in the application settings.
Since 2018-11-07 Heroku ignores it and uses the default 1.8 Java. I have also pushed the system.properties file with content java.runtime.version=11, but it gets ignored either.
Does anybody have a workaround for this?