b4fead3a-72af-4043-56e8-90590de03c92doesn't send response for the PING requests. So cloud close connection. After that device reconnects again to the cloud and then cloud start obsere all resources of the device. This is why you see lot's of GET requests.
oc_notify_observers(). Pulling mechanism is inefficiency so we don't want to support it.
ctx->last_error = 0;
ctx->store.cps = 0;