No image preview when sending images to iPhone

[wkpn]

title^

debugging shows that FileIcon from this line definitely has some bytes in it, but upon receiving no preview is available, just the plain text

Expected behavior: this

Actual behavior: same but without an image

[schmittner]

What‘s the iOS version?
Does this happen with all source files?
Can you send an example?

[wkpn]

iOS version: latest, 13.4.1
I've tried jpg, png and it was all the same no matter what the image was
Interestingly enough, when sending images to MacBook, notification has the preview, while there is nothing on the iOS

[schmittner]

I just confirmed this.

It might be that Apple has changed something regarding the preview format for iOS (used to be JPEG2000). We'll check if something has changed, but this may take some time.

[wkpn]

I've just read the wiki and it says that Apple has disabled preview from non-contacts.

Looks like it is iOS thing and has nothing to do with preview formats (source)

[schmittner]

Thanks for the info. So, it's expected behavior.