What causes these periodic sleeps?

Dear Decawave community,

We have noticed that our tag experiences short interruptions (sleeps) in the reception of range measurements from the anchors every 2 minutes approximately. This symptom is shown in the next image:

The red arrows are about 2 min 15 sec apart, and each of the sleep events lasts for roughly 5 seconds.

We have also detected that when these sleep events occur, two special JSON objects with a "msg" field appear in our UART console, as shown in the following image:

Our particular use case requires a constant uninterrupted feed of ranging measurements, so we cannot afford having interruptions like these.

What causes these periodic sleeps? And how can we avoid them?

Thank you.