Help needed: Spring batch + scheduled task = no transaction

I have a simple spring boot application with a scheduled task. The scheduled task starts a spring batch job.

The scheduled task starts normally and the batch job works fine but nothing Is saved to the database.

You can find all the details in this SO question

https://stackoverflow.com/questions/54457041/spring-boot-repository-does-not-save-to-the-db-if-called-from-scheduled-job

Hope anyone can help.

Edit

I have updated the question at SO with the answer that worked for me.