I'm also trying to figure this out. There is another thread here https://developer.apple.com/forums/thread/666205, where there are only assumptions as answers. I'm not convinced yet. I'd like to get a clear answer from an Apple employee that leaves little room for interpretation :)

Hi h725, just stumbled upon the same issue. Did you find any solution?

I'm having the same issue. @Cloudworker , @AlanRThompson , have you been able to figure out what is happening here?

Hi @walexs , did you find any solution to this issue?

Thanks for the idea with Task.detached. It made no change however. Please check the video below. You can see that when I start dragging the text, the loop prints the numbers in the background. Only when this is finished I can see the drag preview and the + sign to indicate open-in-place. When I drop before this preview is shown nothing happens. When it is shown (in other words, the loop has finished), then it works. In the end, what I want to achieve is that I can drag a URL promise to another application that only accepts file URLs as drop type. As long as the file does not exist (shall be created either when I start dragging, or when dropped to the target application), I want to show a some kind of loading indicator in my app. I have uploaded the code of my drag test application here: https://github.com/sarensw/DragTest. It contains all variants that I have tried so far (nothing works as of now). The one that I asked about in this post is UsingNSItemProvider1. I'm currently playing around with UsingNSViewRepresentable

Hi Kevin, you are right. I misunderstood how this works. Given your explanation that it shows the "narrowest" match, and not the "widest" explains the behaviour that I have seen. Thank you so much for the information.

Hi @martin , did you find any solution to this? Just stumbled into this issue as well.