Also some image formats (jpeg codecs?) load images in passes. First pass may be blurry (check how Product Hunt is doing it, for instance) or pixelated, then image loads completely within 2nd or more passes.
So if you have slow internet on your phone, maybe this is the reason.
No, I don’t think I’m using imgix. I’m uploading photos stored in the device and from the smartphone camera to the app using the picture uploader input form in bubble editor and showing them using the image visual element (some as page static elements and some as a result in a repeating group).
Regarding your second entry, using both 4G and WiFi images look the same.
Without seeing the editor, It just looks like for some reason the phone actually raises the pixel width/height of the image beyond what it should be, while the laptop leaves it at its native width. Phone is 1000px wide vs Laptop which is 334px wide… That would definitely make it look pixellated.