NRF CONNECT APP AND NRF805

[lm]

Hello, 

I'm working with a NRF52840 DK and a module BLE nrf805.

I'm programming thanks to the software SEGGER.

I have sent the blinky simple in my dev kit to test a simple thing. For about 2 months now, i have been working with the Module BLE 805 because i have to use it for a project. After several times, i followed the tutorial (https://devzone.nordicsemi.com/guides/short-range-guides/b/getting-started/posts/developing-for-the-nrf52805-with-nrf5-sdk) and i used the example that was given because i wanted to send The peripheral UART example (Peripheral UART/Serial Port Emulation over BLE (ble_app_uart)) 

. It worked because with my dk and my module fixed to it. But i remark something that i don't understand : theAPP. (nrf connect app)

The first time that i send my program i saw in my app my module and his correct mac adress. But now i dont know why i cant see the device anymore (even when im trying to resend it)

Did someone has already had this issue?

Is that a problem of stability? 

thanks in advance

[lm]

[lm]

I have seen another problem : the problem is that my app ( that i took from nordic expire i cant seen the device after some minutes) could someone explain me why??