Redis connexions problems, Right Configuration? - redis

Question

Good, recently we have a lot of problems between our applications and the redis/sentinel cluster.
the configuration of these parameters is the ideal one?
redis conf:
timeout 0
tcp-backlog 511
tcp-keepalive 300
right now we have about 300+- active clients and 38442 total conexions in the cluster, I can see that some connections have an age of 7-9 hours, is that normal?
Normally, when we encounter these problems we restart the cluster and everything works fine again for an undetermined period of time. But that is not the solution, the devs ensure that the connections are well managed by the multiplexer with the std library to connect to redis by .net.
Any suggestions as to why we might be experiencing these problems?
Some examples of the output of client information (291 total lines):
id=26728 addr=111.222.333.444:51393 laddr=ipClusterRedis:6379 fd=83 name=OT-DEVELOPSERVER age=24767 idle=28 flags=P db=0 sub=4 psub=0 multi=-1 qbuf=0 qbuf-free=0 argv-mem=0 obl=0 oll=0 omem=0 tot-mem=20496 events=r cmd=ping user=default redir=-1
id=27877 addr=222.333.444.555:1817 laddr=ipClusterRedis:6379 fd=256 name=translations-application-v6 age=13859 idle=37 flags=P db=0 sub=1 psub=0 multi=-1 qbuf=0 qbuf-free=0 argv-mem=0 obl=0 oll=0 omem=0 tot-mem=20496 events=r cmd=ping user=default redir=-1
id=26681 addr=333.444.555.666:51377 laddr=ipClusterRedis:6379 fd=36 name=OT-DEVELOPSERVER age=24767 idle=35 flags=P db=0 sub=2 psub=0 multi=-1 qbuf=0 qbuf-free=0 argv-mem=0 obl=0 oll=0 omem=0 tot-mem=20496 events=r cmd=ping user=default redir=-1
id=27743 addr=444.555.666.777:59131 laddr=ipClusterRedis:6379 fd=11 name=offermanager-application-v3 age=22565 idle=29 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=0 argv-mem=0 obl=0 oll=0 omem=0 tot-mem=20504 events=r cmd=info user=default redir=-1
Example of error taken from one application:
2022-06-15 10:24:52 ERROR Execution FetchedJobsWatcher is in the Failed state now due to an exception, execution will be retried no more than in 00:00:09 StackExchange.Redis.RedisTimeoutException: Timeout performing SMEMBERS (5000ms), next: ZRANGEBYSCORE pluginnamex:hangfireschedule, inst: 1, qu: 0, qs: 50, aw: False, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, serverEndpoint: IPredisCluster.myorganization:6379, mc: 1/1/0, mgr: 10 of 10 available, clientName: OT-TESTSERVER, IOCP: (Busy=0,Free=1000,Min=6,Max=1000), WORKER: (Busy=1,Free=32766,Min=6,Max=32767), v: 2.2.88.56325 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor 1 processor, ServerEndPoint server) in //src/StackExchange.Redis/ConnectionMultiplexer.cs:line 2886
at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor1 processor, ServerEndPoint server) in //src/StackExchange.Redis/RedisBase.cs:line 54
at Hangfire.Redis.FetchedJobsWatcher.Execute(CancellationToken cancellationToken)
at Hangfire.Processing.BackgroundExecution.Run(Action`2 callback, Object state)