After enabling the OCTO, video stream gets a black appearance

Hi all,
Actually, I did the OCTO setup successfully. I used SplitBridgeSelectionStrategy. My OCTO setup is correct. But the problem that has happened to me, it’s available to see only the video streams in the same region. All the other things appear in black. If I further explain, my first JVB’s region is region1 & my second JVB’s region is region2.
Then if I create a conference with three participants, we can see the video streams of the two participants who have connected to the same JVB. But the other stream appears in black. Do you know the reason for this? Thank you

Here is JVB 1 sip-communicator.properties file.

org.ice4j.ice.harvest.DISABLE_AWS_HARVESTER=true
org.ice4j.ice.harvest.STUN_MAPPING_HARVESTER_ADDRESSES=meet-jit-si-turnrelay.jitsi.net:443
org.jitsi.videobridge.ENABLE_STATISTICS=true
org.jitsi.videobridge.STATISTICS_TRANSPORT=muc
org.jitsi.videobridge.xmpp.user.shard.HOSTNAME=<DOMAIN>
org.jitsi.videobridge.xmpp.user.shard.DOMAIN=auth.<DOMAIN>
org.jitsi.videobridge.xmpp.user.shard.USERNAME=jvb
org.jitsi.videobridge.xmpp.user.shard.PASSWORD=7rOlV1X9
org.jitsi.videobridge.xmpp.user.shard.MUC_JIDS=JvbBrewery@internal.auth.<DOMAIN>
org.jitsi.videobridge.xmpp.user.shard.MUC_NICKNAME=jvb1
org.jitsi.videobridge.xmpp.user.shard.DISABLE_CERTIFICATE_VERIFICATION=true
org.jitsi.videobridge.octo.BIND_ADDRESS=<JVB Local IP>
org.jitsi.videobridge.octo.PUBLIC_ADDRESS=<JVB Public IP>
org.jitsi.videobridge.octo.BIND_PORT=4096
org.jitsi.videobridge.REGION=region1
org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS=<JVB Local IP>
org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS=<JVB Public IP>

Here is JVB 2 sip-communicator.properties file.

org.ice4j.ice.harvest.DISABLE_AWS_HARVESTER=true
org.ice4j.ice.harvest.STUN_MAPPING_HARVESTER_ADDRESSES=meet-jit-si-turnrelay.jitsi.net:443
org.jitsi.videobridge.ENABLE_STATISTICS=true
org.jitsi.videobridge.STATISTICS_TRANSPORT=muc
org.jitsi.videobridge.xmpp.user.shard.HOSTNAME=<DOMAIN>
org.jitsi.videobridge.xmpp.user.shard.DOMAIN=auth.<DOMAIN>
org.jitsi.videobridge.xmpp.user.shard.USERNAME=jvb
org.jitsi.videobridge.xmpp.user.shard.PASSWORD=7rOlV1X9
org.jitsi.videobridge.xmpp.user.shard.MUC_JIDS=JvbBrewery@internal.auth.<DOMAIN>
org.jitsi.videobridge.xmpp.user.shard.MUC_NICKNAME=jvb2
org.jitsi.videobridge.xmpp.user.shard.DISABLE_CERTIFICATE_VERIFICATION=true
org.jitsi.videobridge.octo.BIND_ADDRESS=<JVB Local IP>
org.jitsi.videobridge.octo.PUBLIC_ADDRESS=<JVB Public IP>
org.jitsi.videobridge.octo.BIND_PORT=4096
org.jitsi.videobridge.REGION=region2
org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS=<JVB Local IP>
org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS=<JVB Public IP>

Here is my Jicofo sip-communicator.properties file.

org.jitsi.jicofo.BRIDGE_MUC=JvbBrewery@internal.auth.<DOMAIN>
org.jitsi.jicofo.BridgeSelector.BRIDGE_SELECTION_STRATEGY=SplitBridgeSelectionStrategy