Steps to reproduce:

• Create a project
• In Model Editor view, create a new model "Model"
• Right-click on top of "Column1" and select "Edit"
• -> Column type shown correctly as "String"
• Change the type to e.g. "image"  and click "Apply"
• Create another column "New column" of type string
• Right-click on top of "New column" and select "Edit"
• -> Type is shown as "image" although it actually is string and warning about conversion leading to data loss is shown. Seems like type is somehow taken from previous editing. 
• -> Expect to see type correctly and no warnings before type is actually changed to something.