mongimport of TSV/CSV file with Byte Order Mark causes incorrect field name

Create a file in CSV or TSV format, with a header line, with a UTF-8 Byte Order Mark at the beginning (0xefbbbf). See such a file attached. mongoimport --type tsv --headerline on the file into a collection.

Note that the first field's name in the database has a UTF-16 BOM in front of it. This is invisible during normal shell work, but it's there and prevents queries on that field from working. Here's a terminal session showing the issue.

mongoimport --db test --collection foo --file jets_agency_systems.html --type tsv --headerline

mongo

MongoDB shell version: 3.2.8

connecting to: test

> db.foo.findOne()

{

	"_id" : ObjectId("57ab94a12486607096162845"),

	"ID" : "C",

	"AGENCY_TEXT" : "US AIR FORCE"

}

> db.foo.find({ID:'C'})

> db.foo.find({"\ufeffID":'C'})

{ "_id" : ObjectId("57ab94a12486607096162845"), "ID" : "C", "AGENCY_TEXT" : "US AIR FORCE" }

>