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BLE issue esp32 in blynk

Hi, I have a Iphone8 and having issue with Blynk connect to esp32 thru BLE, I use a Blynk sketch example that was working and could connect before, but now its not working!, I see the BLE devicename in blynk but when choose to BLE connect its get device couldnt find!, is my esp32 faulty or any clue howto?