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UART BLE SDK example - Cannot transmit from NRF52832DK to smartphone (IOS)

Good morning,

I am running the UART example from SDK 14.2 (example/ble_peripheral/ble_app_uart) on a brand-new NRF52832 development kit (PCA10040).

On the master side, I am using an Ipad running the official nRF toolbox application.

The problem I am currently facing since a couple of days, is that I can successfully connect from the tablet to the NRF52DK, I can successfully transmit data from the master to the slave,

but I cannot transmit data from the NRF52 to the tablet. I tried using several different terminals on the computer (Coolterm, GtkTerm, Putty), and tried different settings.

On the log of the tablet, I see that the notifications for the TX characteristic are enabled.

On the DK, I see that the funcation uart_event_handle is called continuously, even if there is no data written (it falls always in the "default" case of the switch analyzing the event type),

Any help/suggestion would be appreciated, since I am unable to understand what is going wrong. 

The code is the original one coming from Nordic.

Thanks to everyone

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