Slower performance after upgrading to 4.4 from 4.2

The message in question is below
"ctx":"LogicalSessionCacheRefresh","msg":"Slow query","attr":{"type":"command","ns":"config.$cmd","command":{"update":"system.sessions","ordered":false,"allowImplicitCollectionCreation"

In mongo 4.2, I see about 200 of these log msgs and all have durationMilis under 200. However, since upgrading to mongo 4.4, there are 600+ log msgs of them and 99% of them report durationMilis over 15000ms. Could these log msgs and how long it takes have an impact on the overall mongo performance?

Mongod.conf and rs.conf() below

mongod.conf :

#operationProfiling:

slowOpThresholdMs: 50
mode: slowOp
mode: all
mode: off
replication:
   replSetName: "xxxxx"
   oplogSizeMB: 5000000
   enableMajorityReadConcern: false
processManagement:
   fork: true
   pidFilePath: /app/mongod/xxxxx/mongod.pid
net:
   port: xxxx
   bindIp: "xxxx"
   ipv6: false
   unixDomainSocket:
      enabled: false 

http:
enabled: false
JSONPEnabled: false
RESTInterfaceEnabled: false
storage:

indexBuildRetry: false
   directoryPerDB: true
   journal:
      enabled: true     
   dbPath: "/app/mongod/prod1/data/xxxx"
   engine: "wiredTiger"
   wiredTiger:
     indexConfig:
        prefixCompression: true
     engineConfig:
         journalCompressor: snappy
         directoryForIndexes: true
         cacheSizeGB: 350

statisticsLogDelaySecs: 30
 collectionConfig: 
     blockCompressor: snappy        
inMemory:
engineConfig:
statisticsLogDelaySecs: 30
security:
     keyFile: /app/mongod/prod1/xxx.keyfile
     clusterAuthMode: keyFile
     authorization: enabled
     transitionToAuth: false
     javascriptEnabled:  true

redactClientLogData: false
systemLog:
   verbosity: 0
   quiet: false
   traceAllExceptions: false
   path: "/app/xxxxx/mongodb.log"
   logAppend: true
   logRotate: reopen
   destination: file

timeStampFormat: ctime
MONGODB_PROD1:PRIMARY> rs.conf()
{
        "_id" : "xxxx",
        "version" : 65844,
        "term" : 394,
        "protocolVersion" : NumberLong(1),
        "writeConcernMajorityJournalDefault" : true,
        "members" : [
                {
                        "_id" : 4,
                        "host" : "xxxx",
                        "arbiterOnly" : false,
                        "buildIndexes" : true,
                        "hidden" : false,
                        "priority" : 1,
                        "tags" : {

                    },
                    "slaveDelay" : NumberLong(0),
                    "votes" : 1
            },
            {
                    "_id" : 5,
                    "host" : "xxxx",
                    "arbiterOnly" : false,
                    "buildIndexes" : true,
                    "hidden" : false,
                    "priority" : 10,
                    "tags" : {

                    },
                    "slaveDelay" : NumberLong(0),
                    "votes" : 1
            },
            {
                    "_id" : 6,
                    "host" : "xxxx",
                    "arbiterOnly" : false,
                    "buildIndexes" : true,
                    "hidden" : false,
                    "priority" : 1,
                    "tags" : {

                    },
                    "slaveDelay" : NumberLong(0),
                    "votes" : 1
            },
            {
                    "_id" : 7,
                    "host" : "xxxx",
                    "arbiterOnly" : false,
                    "buildIndexes" : true,
                    "hidden" : false,
                    "priority" : 1,
                    "tags" : {

                    },
                    "slaveDelay" : NumberLong(0),
                    "votes" : 1
            },
            {
                    "_id" : 8,
                    "host" : "xxxx",
                    "arbiterOnly" : false,
                    "buildIndexes" : true,
                    "hidden" : false,
                    "priority" : 4,
                    "tags" : {

                    },
                    "slaveDelay" : NumberLong(0),
                    "votes" : 1
            }
    ],
    "settings" : {
            "chainingAllowed" : true,
            "heartbeatIntervalMillis" : 2000,
            "heartbeatTimeoutSecs" : 10,
            "electionTimeoutMillis" : 10000,
            "catchUpTimeoutMillis" : -1,
            "catchUpTakeoverDelayMillis" : 30000,
            "getLastErrorModes" : {

            },
            "getLastErrorDefaults" : {
                    "w" : 1,
                    "wtimeout" : 0
            },
            "replicaSetId" : ObjectId("xxxx")
    }
}

This looks like a server internal query. Do you notice anything bad from application level?(e.g. CPU high use or high latency on queries)

I definitely feel the entire app being slow. Nothing else has been changed in the app other than mongo version so I’m thinking this is where the slowness is coming from. The CPU usage is same as before, hence not sure if that has any impact.