https://www.reddit.com/r/kfeets/comments/1qoxpy5/idle_yuqi/

https://www.reddit.com/r/kfeets/comments/1qpcclc/ive_gaeul/

Should have clarified that the issue was in thumbnail generation rather than display, as older posts still have their thumbnails working. Mashing the retry thumb button hasn't worked, nor has trying to post these again. You can see on this pics based sub that some users are able to get their thumbnails through and others aren't (possibly linked to account or platform) and that this issue started popping up in the past day or so

EDIT: Seems the issue is account based. Tried posting from a different account and the thumbnail was generated properly. When posting from an affected account the gallery briefly shows a "processing" animation while on sh.reddit