dispatch_semaphore Priority inversion problem

[huanglins]

Thread Performance Checker: Thread running at QOS_CLASS_USER_INITIATED waiting on a lower QoS thread running at QOS_CLASS_DEFAULT that performed synchronous networking which can incur variable delays. Investigate ways to avoid priority inversions

[developer-appdam]

I believe I'm having the same issue. I used to have a video processing nicely and now the whole app freezes at exactly the point where the export should happen. Any fix for this?

[nyeu]

I have the same problem, any idea?