Thumbnails of type .thumbnail work correctly. I can confirm this. But you need an existing file for the given URL. .icon normally works also without an existing file. As a workaround, we have created a set of icon of the most used file types. In iOS 18.3.1: no change to this issue and also no Simulator available.

Thank you for your reply. I will update the app now and send it out and we will see how step 1 works.

Thank for your quick reply. Ok understood. So there are two possible solutions. Quick and dirty: Reduce the batch size to 100 Reliable: Split the batch size and retry recursively until no limit exceeded error is returned. BUT "and the maximum number of tokens in a request is limited to 200" How can I predict how many tokens are needed for my request? Is there any documentation available?

Today I have also tried: let documentInteractionController = UIDocumentInteractionController(url: fileURL) return documentInteractionController.icons.first It works under 18.2 but not under 18.3 Same error on console

Thank you for your quick reply. I have already opened a bug report: FB16445589 Yes this issue starts with iOS 18.3 in an already existing app out to customers. This issue does not occur in former versions. I have now added a sample project too.