iOS App failed enter into DFU buttonlessExperimentalService Mode , but no issues on Android with same firmware

iOS App failed enter into DFU buttonlessExperimentalService Mode , but no issues on Android with same firmwarehttps://devzone.nordicsemi.com/f/nordic-q-a/40953/ios-app-failed-enter-into-dfu-buttonlessexperimentalservice-mode-but-no-issues-on-android-with-same-firmwareHi all: My iOS app use iOSDFULibrary to update my ble.But when the device enter into DFU mode ,it disconnected for a while. This is my log: 2018-11-27 21:00:11.122263+0800 [D]SafeWallet[2040:130912] logWith Connecting to xxxxxx... 2018-11-27 21en-USTelligent Community 13Wed, 28 Nov 2018 12:08:21 GMTRE: iOS App failed enter into DFU buttonlessExperimentalService Mode , but no issues on Android with same firmwarehttps://devzone.nordicsemi.com/thread/159406?ContentTypeID=1Wed, 28 Nov 2018 12:08:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:04a7f431-602d-4060-94cd-e00b10fd6e5aEinar Thorsrud<p>Hi,</p> <p>Which SDK version and which iOSDFULibrary version are you using? Can you use the debug bootloader with RTT logging and upload the log here?</p><div style="clear:both;"></div>