BLUE NRG-2 stop advertising after couple of hours

[DVars.1]

I am using bluenrg-2 device with the low energy BLE example BLE-CHAT.

The device stop advertising after a few hours of advertising and connections and disconnections.

I leave the device working and advertising for whole night and in the morning it stops advertising.

What may be the reason?

Is there timeout of hours on that?

Is there any sleep on the advertising?

[GChir.2]

Hi @Dvars.1. Could you share the source code of the BLE-Chat example? I cannot import the sample files contained in the BLUENRG_DK package in any way. Thanks