Commands typed and their output results are lost when switching to a different tab in the groovy app and then going back to the console. The script context and command history are correct though.
The console is a Vaadin wrapper around http://terminal.jcubic.pl/ which exposes two functions fit for our purpose

• export_view
  • called every time a command is sent to the server so that the component state always contains the latest UI state or view.
• import view
  • called when coming back to the console. It restores correctly the greetings message and the prompt but not the lines containing the commands and their output.