For last Before 2-3 weeks ago faced similar issue, then restarted server and issue didn't happed, but just now again happened, I see no particular pattern in this issue, this happen rarely but when happens nothing work with mongodb and get this error:
{"operationTime":"6669675531664883727","ok":0,"errmsg":"command find requires authentication","code":13,"codeName":"Unauthorized","$clusterTime":{"clusterTime":"6669675531664883727","signature":{"hash":"jqjMmazFtCflNf4HZVikFGd4xbE=","keyId":"6634412437120483330"}},"name":"MongoError"}