Images jump when the position is the same

[shyim]

Beschreibung:
Create a product and add an images to this. All new images get the position 1. This causes the images to jump on the detail page when the cover image is changed and has the same id as another image.

Umgebung:
6.2.2

Schritte zur Reproduktion:
Create a product
Add an image -> marked as cover
Save
Add further images
Mark another image as cover
Open detail page

Erwartetes Ergebnis:
The correct image is displayed as the cover

Tatsächliches Ergebnis:
First the correct cover is shown shortly and then jumps to the other image with the same position very fast