Variation image change

Dear sir/Madam,

I purchased the premium version of your plug-in.

I created a new variable product with two attributes: “Harskleur” and “Materiaal”. Harskleur means “resin color” and “Material” means “Material”. Harskleur has the following colors: Aqua, Baby Blue and Black. Material: 14krt geelgoud and Zilver. geelgoud means Yellow gold and Zilver means Silver.

Both attributes are used for variations.
I did add all the combinations as variations.

Each variation does have a own product image.

If I select “14krt geelgoud” the “Harskleur” are shown correctly; see screenshot1.png.
If I select “Zilver” it still shows the variation images of the gold Harskleur; see screenshot2.png.

But when I click on a Harskleur, the main product image is changing correctly; see screenshot3.png. But the Harskleur thumbnail is still gold.