Problem with the second image and color variant

[maxffj]

Hi, 

I have a problem with my color variants. By clicking on the different products colors -> "Only display images with selected colors" is working well, with one exception. The second image from the last clicked product color is still displaying... (I have checked, my Alt Text is configured right). After a reload it disappears. I have tried different colors as start it's still the same issues. Has anyone an idea how I can solve this? 
Attached you will see my problem.

Thanks in advance for helping me out