Hi Ziqiao, Thank you for confirming the issue. I've filed a Feedback Report as suggested: FB22384792 I'm also experiencing this on Apple Watch Ultra 2 with the latest watchOS. My configuration matches the documentation exactly (WKBackgroundModes with underwater-depth, WKSupportsAutomaticDepthLaunch = true, shallow depth entitlement). I've referenced the original thread (https://developer.apple.com/forums/thread/773542) and feedback report FB16448625 in my submission. Would appreciate any updates from the watchOS team. This is blocking a key feature for our freediving app launch. Thanks, Alexis