External Tool as a Before Launch option prevents a JAR Application running in 2020

I have an External Tool which simply runs a batch file to copy a jar from one place to another before launching a JAR Application. My overall build process is to run a Maven Compile stage, External Tool (copy JAR), then run an application and this worked in 2019. With 2020 it just stops after executing the batch file. If I remove the external tool phase, it will maven compile and then run the application just fine.

Did something change or is this just a new bug?

EDIT: Must be a bug. Disabling Open console for tool output makes it work just fine