Unable to save imported DMN asset

• Create new project;
• Import DMN asset (for instance the one attached with this JIRA);
• Navigate to the Risk DMN decision and make a change (for instance change riskScore from 0 to 1);
• Click on Save button (nothing will happen - if the model is properly saved there is a pop up message... but in this case no message is shown);
• Click on Menu -> Execution Servers;

As a result an error pop up message will be shown containing something like:

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You have unsaved changes in the testingDMNImport project, and they will be lost if you proceed. This action cannot be undone.

The following assets will have their changes lost:

src/main/resources/test.dmn

Do you want to proceed anyway?
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If we add a new DMN asset that will contain exactly the same model as the one above, the attempt to save the change will work fine.