I might miss something but when I create compound index for nested array of documents, when I filter by fields from those index, only one of them is filtered inside INDEX_SCAN stage, and another field is filtered in FETCH stage

Sample script:

db.test.drop()
for(var i = 0; i < 100; i++){    
   db.test.insert({units: [{jobs: [{jobType: i % 3, status: i % 10 }]}]})
}
db.test.createIndex({"units.jobs.status": 1, "units.jobs.jobType": 1})
db.test
   .find({ "units" : { "$elemMatch" : { "jobs" : { "$elemMatch" : { "jobType" : 0, "status" : 3 } } } }})
   .explain('executionStats')

Last query end up with following INDEX_SCAN:

"indexBounds" : { "indexBounds" :

,

and result set is filtered with FETCH phase.

Is this expected behavious and if so, what is possible workaround?

Thanks in advance