Query Params Got Modify

node: 6.x.x
restify: 6.2.3

I got some unmatch query params while requesting to my api. for example
if i hit http://myapi/content/1?verify=true&released=true
it suppose read as

{
  verify: 'true',
  released: 'true'
}

on the req.query
but instead i got

{
  verify: ['true', 'true'],
  released: 'true'
}

any ideas why this is happend ?

on my server config :

self._server.pre(cors.preflight);
self._server.use(cors.actual);
self._server.use(restify.plugins.queryParser({
   mapParams: true
}));
self._server.use(restify.plugins.bodyParser({
  mapParams: true
}));

Reproduce the request with the shown queryParser and bodyParser configuration, then trace how req.query is populated for repeated or duplicated parameters. Done means identifying why verify becomes an array while released does not, and documenting the expected behavior or the relevant configuration change.