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Thanks. For your information, the feedback report number of the previous report was FB10905125 (in iOS16 Beta 4), and FB10764167 (in iOS16 Beta 3)

Hi, I have the exact same problem when the device update from iOS/iPadOS 15.6 to iOS 16 Betas, our application identifies via the following code and register the device with the client IDFV in backend. My app is also an Enterprise App for in-house distribution and not distribute in APP Store, it is confirmed that the bundle ID does not change and the application did not uninstall in between. NSString *IDFV = [[[UIDevice currentDevice] identifierForVendor] UUIDString];  We have just tested the latest Developer Beta 5 and Public Beta 3 still have the same problem updating from public release iOS/iPadOS 15.6. (i.e. iOS/iPadOS update from public release 15.6 to iOS/iPadOS 16 Beta 5, the IDFV changed unexpectedly) However, iOS/iPadOS version updating among Beta Version will not change the IDFV (i.e. iOS/iPadOS update from 16 Beta 1 -> 2 -> 3 ->4->5, the IDFV remain unchanged). Could anyone explain the behavior? Thanks.