Temporary force jump to welcome-page

Hi,
I deploy the jitsi-meet with Self-Hosting Guide - Debian/Ubuntu server。
Recently, I found participants in one meet, suffered large area force jump to welcome-page, and the frequency is a bit high.The phenomenon happens in meet scale with 10+,5~6.
Strange things, the meeting didn’t end, there are still people who can use it normally. And i found no errors in jvb.log,jicofo.log,prosody.log, only some warnning in jvb.log.
jvb Warnning logs file see post file.

The jitsi-meet versions:
jitsi-meet-prosody/stable 1.0.6447-1 
jitsi-meet-turnserver/stable 1.0.6447-1 
jitsi-meet-web-config/stable 1.0.6447-1 
jitsi-meet-web/stable 1.0.6447-1  
jitsi-meet/stable 2.0.7648-1 
jitsi-videobridge2/stable 2.2-22-g42bc1b99-1
The jvb sip-communicator.properties
org.ice4j.ice.harvest.DISABLE_AWS_HARVESTER=true
org.ice4j.ice.harvest.STUN_MAPPING_HARVESTER_ADDRESSES=**mydonmain**:3478
org.jitsi.videobridge.ENABLE_STATISTICS=true
org.jitsi.videobridge.STATISTICS_TRANSPORT=muc
org.jitsi.videobridge.xmpp.user.shard.HOSTNAME=localhost
org.jitsi.videobridge.xmpp.user.shard.DOMAIN=auth.mydonmain
org.jitsi.videobridge.xmpp.user.shard.USERNAME=jvb
org.jitsi.videobridge.xmpp.user.shard.PASSWORD=5vN0NBJq
org.jitsi.videobridge.xmpp.user.shard.MUC_JIDS=JvbBrewery@internal.auth.mydonmain
org.jitsi.videobridge.xmpp.user.shard.MUC_NICKNAME=feb30956-60a6-4d93-9611-75e986b2eec2

org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS=**myLocalIP**
org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS=**myPublicIP**
And The main changed config like this:
     desktopSharingFrameRate: {
        min: 15,
        max: 30,
     },
    videoQuality: {
         preferredCodec: 'VP9',
         maxBitratesVideo: {
                VP8 : {
                    low: 200000,
                    standard: 500000,
                    high: 1500000,
                },
                VP9: {
                    low: 100000,
                    standard: 300000,
                    high: 1200000,
                },
          },
    }
   channelLastN: 25,
   flags: {
        sourceNameSignaling: true,
        sendMultipleVideoStreams: true,
        receiveMultipleVideoStreams: true,
    },
    p2p: {
        enabled: true,     
        preferredCodec: 'VP9',
        disableH264: true,
        stunServers: [
             { urls: 'stun:mydomain:3478' },
        ],
    },

I searched the community and github issues , there is no relevant discussion.
Has anyone encountered related phenomena or provided some ideas,thx.

org.ice4j.ice.harvest.STUN_MAPPING_HARVESTER_ADDRESSES=**mydonmain**:3478

This shouldn’t be your local STUN server

I have changed the default value, but it seems not work.

stun:meet-jit-si-turnrelay.jitsi.net:443