The nRF9160 modem is not providing signal notifications when sending data

Hi, 

we are sending data to our cloud platform every few seconds via the NB-IoT network and we noticed that we do not receive any CESQ or SNR notifications when we are connected AND transferring the data. We receive the CESQ and SNR only after going from CFUN=0 to CFUN=1 and getting connected to the network.

When we don't start the data transmissions, we receive both CESQ and SNR notifications when the value changes. However, after starting the data transmission, signal notifications won't appear again. Furthermore, when we try to manually poll the value with AT+CESQ its value is static until the modem stops operating. What could be the cause? We are using NCS 1.3 and modem firmware 1.2.

Best regards,

Lukas

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