Workflow > Transition form validation broken

• I create a workflow
• I put a node into the graph designer
• I edit the node properties
• I go to the transition tab
• I create a transition with an empty name
• Click on save
• A popup explaining the error is displayed
• I click on the button alone "Ok"

Problem:

• Click on Ok, save the form anyway

Expected behaviour

• Let the form opened and waits fix of the user and maybe propose to discard the node modification.