Turns out it's happening again. This error popped up in the corner:
{"data":{"error":"unknown","message":"Request error: error sending request for url (http://pictrs:8080/image): operation timed out"},"state":"success"}
Oh woops, I missed that https://fhf-lemmyworld.instatus.com/ says "LW Backend Resources experiencing major outage." It could be that, although it also says the image hosting backend has 100% uptime.
TheGreatJouneyIsA @ TheGreatJouneyIsA @lemmy.world Posts 10Comments 3Joined 2 yr. ago 
Turns out it's happening again. This error popped up in the corner:
{"data":{"error":"unknown","message":"Request error: error sending request for url (http://pictrs:8080/image): operation timed out"},"state":"success"}