Why does reddit image links and Giphy gifs links keep getting rejected by mangadex image upload in the comments ?

[Jack1996]

I understand how some random not popular sites image links don't work, but those 2 in the title are known enough, so what's the reason?
Not sure if it's a bug on my side or it's like this for everyone.

 

[Angry_Panda]

You might try inserting those as media rather than an image upload.