Uploading image by paste overrides previously inserted images

Everytime I add an Image by pasting in from the clipboard using Firefox, the Image is named "grafik.png". Since every image gets that exact same name grafik.png gets replaced every time I paste a new image. The result is that the same image occurs for every image I pasted in the article after saving it. However the issue doesn't occur if I do the exact same thing using Chrome v80.0.3987.163.

I found a simular, solved issue where the image was named "image.png" after inserting. Since my system language is german (de) I assume that this issue was probably ony fixed for the exact filename image.png.

http://jira.xwiki.org/browse/CKEDITOR-169

The issue also occurs when using internet explorer.