Creator allows running application twice and fails

1. Create a new project.
   I used a Qt Widget Application project.
2. Run this project on an iOS device or in the iOS Simulator.
3. While the application is running, tell Creator again to run it.
   Creator will build and deploy the application again and then show unwanted behaviour on the device/in the Simulator.

My understanding is that iOS projects can only be run once at a time, should Creator should just not allow running them a second time in parallel.