Ir is not , because it was working fine like 3 days ago.
Server response time is the same
Are there issues with any other specific topics in forum, or just the one that you mentioned with 50 images?
It is a bit strange that TalkImg recently had some serious issues, and your service is also using images, maybe there is some connection.
It's different, what happened to TalkImg was that it suffered a supposed DDoS attack.
From the looks of it, someone is trying to make money by spreading attacks on services and the like, somehow linked to the forum. I say this based on some feedback I received from other users.
Even so, this will not be the case. It was probably some configuration change, perhaps an update (?), but we still can't understand what it is.