Image loading issue in posts

Hello,
i have a weird issue with images in my posts: Some images are loaded as sharp webPs (1536×1024) and some as blurry jpgs (696×464). I uploaded all of them the same way via WordPress-Backend.
Funny Fact: If i change the image size/resolution of an blurry jpg image in the Gutenberg-Editor to a Thumbnail and then back to large it is also loaded as a webP in the frontend. Same happens if i put in a new image in a post. Why is this and how can i load all images as sharper webPs?

Here is a Link to a Page with this issue: https://rauf-und-davon.at/die-schoensten-hochtouren-in-oesterreich/ – as you can see: Some are sharp webPs (2, 3) and some are blurry jpgs (1, 4, 5).

All the best,
Daniel

• This topic was modified 2 years by danna.
• This topic was modified 2 years by danna.

Sorry Number 5 is also a sharp webP

Actually it would be interesting to know, where and how i can decide which image is loaded, when i upload it as a large image to a post. In die Media Settings large images have 696 width and height.