nRF9160 excess power consumption after RTT disconnect

After connecting to an nRF9160 using SEGGER tools (J-Link RTT Viewer v7.62b), excess power consumption is observed until the device is reset (via `nrfjprog -r`)

First the board is using a low amount of current, after RTT connects more power is used, but after disconnecting the consumption does not return to the original value.

The image below show the sequence.

I suspect that the DWT hardware block is not being correctly powered down on the disconnect. This issue does not occur on nRF82840 designs.

Related