Got it, thanks for your response.

Hi, I'm having an issue with HealthKit background delivery on watchOS 11.3.1, I'm using HKObserverQuery and I'm experiencing CSLHandleBackgroundHealthKitQueryAction watchdog transgression crash. I confirm that I have called HKObserverQueryCompletionHandler correctly and in time. Is there any special requirement for the code to call HKObserverQueryCompletionHandler? For example, does it have to be in the main thread?

I don't know iOS 18.3, but iOS 18.5 + background audio can't.

same issue here, FB20267253