Annotate device doesn't work from STANDBY nodes

From: https://groups.google.com/a/onosproject.org/forum/#!topic/onos-dev/orNSSTCPB7w
I am using ONOS 1.9.0 and trying to apply annotations in cluster environment.

onos> masters
192.168.10.138: 0 devices
192.168.10.139: 1 devices
of:000100c88b56a3af
192.168.10.140: 0 devices

When I try to annotate device from a non-master node, I cannot apply the annotations:

onos> annotate-device of:000100c88b56a3af rackAddress 1
onos> devices
id=of:000100c88b56a3af, available=true, local-status=connected 2s ago, role=STANDBY, type=SWITCH, mfr=Cisco Systems, Inc., hw=N9K-C9372PX-E V01, sw=7.0(3)I2(2)| of_agent 2.1.5, serial=SAL2003X3R5, driver=default, channelId=192.168.10.235:60007, dcNodeType=LEAF, managementAddress=192.168.10.235, name=leaf_cisco, protocol=OF_13, rackId=6, rackPosition=5

No rackAddress annotation.

But, when I do it from master node, it is successful:

onos> annotate-device of:000100c88b56a3af rackAddress 1
onos> devices
id=of:000100c88b56a3af, available=true, local-status=connected 2s ago, role=MASTER, type=SWITCH, mfr=Cisco Systems, Inc., hw=N9K-C9372PX-E V01, sw=7.0(3)I2(2)| of_agent 2.1.5, serial=SAL2003X3R5, driver=default, channelId=192.168.10.235:60007, dcNodeType=LEAF, managementAddress=192.168.10.235, name=leaf_cisco, protocol=OF_13, rackAddress=1, rackId=6, rackPosition=5

I know, we need to wait for 2-3 seconds before annotations are applied and I did that.