Mongo system buildinfo operationTime when converted to BsonTimestamp converts to future year

We are trying to get current timestamp from mongo atlas cluster with below code:
fun getClusterTimestamp() =
mongoClient
.getDatabase(“system”)
.runCommand(Document(“buildInfo”, 1))
.let { it[“operationTime”] as BsonTimestamp }

It returns timestamp in future when converted to as BsonTimestamp. Mostly it shows timestamp in year like 2095 or in year 2045 etc…
Driver Version we are using - org.mongodb:mongo-java-driver:3.9.1