View with collation doesn't work as expected in sharded cluster

In single mongod instance: > db.test.insertMany([{ "nm" : "case" }, { "nm" : "CaSe" }, { "nm" : "câse" }]) { "acknowledged" : true , "insertedIds" : [ ObjectId( "59b7887b90afeae466d0cdcb" ), ObjectId( "59b7887b90afeae466d0cdcc" ), ObjectId( "59b7887b90afeae466d0cdcd" ) ] } > db.createView( "view" , "test" , [{$match: { "nm" : "case" }}], { "collation" : { "locale" : "en" , strength: 1}}) { "ok" : 1 } > db.view.find() { "_id" : ObjectId( "59b7887b90afeae466d0cdcb" ), "nm" : "case" } { "_id" : ObjectId( "59b7887b90afeae466d0cdcc" ), "nm" : "CaSe" } { "_id" : ObjectId( "59b7887b90afeae466d0cdcd" ), "nm" : "câse" } In sharded cluster (2 shards, 3 config server started as replicaSet). Collection is not sharded Cluster info : mongos> sh.status() --- Sharding Status --- sharding version: { "_id" : 1 , "minCompatibleVersion" : 5 , "currentVersion" : 6 , "clusterId" : ObjectId( "59b7860fbc018363095e4c79" ) } shards: { "_id" : "shard0000" , "host" : "localhost:27021" , "state" : 1 } { "_id" : "shard0001" , "host" : "localhost:27022" , "state" : 1 } active mongoses: "3.4.9" : 1 autosplit: Currently enabled: yes balancer: Currently enabled: yes Currently running: no Balancer lock taken at Tue Sep 12 2017 11 : 00 : 35 GMT+ 0400 (RET) by ConfigServer:Balancer Failed balancer rounds in last 5 attempts: 0 Migration Results for the last 24 hours: No recent migrations databases: { "_id" : "test" , "primary" : "shard0000" , "partitioned" : false } mongos> db.test.insertMany([{ "nm" : "case" }, { "nm" : "CaSe" }, { "nm" : "câse" }]) { "acknowledged" : true , "insertedIds" : [ ObjectId( "59b7890412b88ce4ce4ccf30" ), ObjectId( "59b7890412b88ce4ce4ccf31" ), ObjectId( "59b7890412b88ce4ce4ccf32" ) ] } mongos> db.createView( "view" , "test" , [{$match: { "nm" : "case" }}], { "collation" : { "locale" : "en" , strength: 1}}) { "ok" : 1 } mongos> db.view.find() { "_id" : ObjectId( "59b7890412b88ce4ce4ccf30" ), "nm" : "case" }