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.
just this one, when you request up to 5 images it works fine.
This is something related to rate limits, maximum number of requests per second