Not possible to save project with any element in container using Standalone mode

Start Workbench on http://localhost:8080/business-central Create Project with name `quick` Create Business Process with name `Process` Start Event -> End Event and Save process. Open Business Process in Standalone mode (goto: http://localhost:8080/business-central/kie-wb.jsp?standalone&path=default://master@bpms-assets/quick/src/main/resources/bpms/quick/Process.bpmn2 ) Add any container (for example Swimlane or Embedded subprocess) and move any node to it Try to Save Business Process Actual Result: No green notification about Successful Save will be shown, after page refresh no changes saved. No messages in Server log as well. Expected Result: Process will be saved without any issues and "Successfully Saved" green confirmation will be shown.