3D editor does not update after removing map from material unless mouse is hovered over editor

Steps to reproduce:

• Import some png to a project, e.g. the one attached
• Add view3D
• Drag and drop image on top of cubematerial in the navigator
• In the "Select texture property" select e.g. diffuse map
• In cubematerial properties, select "None" for Diffuse map property to remove it
• -> 3D Editor does not update to removal
• Hover mouse over 3D Editor -> 3D Editor updates