Drupal::request()->request->all() returns an empty array

I have a custom controller that expects POST data. I had it working fine in 8.1.0 retrieving the data using Drupal::request()->request->all() and Drupal::request()->request->get($myvar).

Now, without any changes in my custom module, Drupal::request()->request->all() is returning an empty array, and Drupal::request()->request->get($myvar) is returning NULL.

Between the time it was working and when the issue arose, my hosting service Pantheon updated their Drupal 8 version from 8.1.0 to 8.1.1 and then 8.1.2. I suspect something may have changed then that affected this.

How can I fix this?

EDIT: Thanks for the comments, still not quite working…

Route YAML:

mymodule.foobar:   path: '/foobar'   options:     _auth: [ 'basic_auth' ]   defaults:     _controller: 'DrupalmymoduleControllerFooBarController::foobar'     _title: 'foobar'   requirements:     _user_is_logged_in: 'TRUE'     _permission: 'administer site configuration' 

Controller:

<?php namespace DrupalmymoduleController; use DrupalCoreControllerControllerBase; use SymfonyComponentHttpFoundationJsonResponse; use SymfonyComponentHttpFoundationRequest; /**  * Class FooBarController.  *  * @package DrupalmymoduleController  */ class FooBarController extends ControllerBase {   /**    * Provides content for the /mymodule/foobar path.    *    * @param SymfonyComponentHttpFoundationRequest $request    *   The current request    */   public function foobar(Request $request) {     $content = $request->getContent();     $data = array();     $data['a'] = $request->get('foo');     $data['b'] = $request->request->get('foo');     $data['c'] = Drupal::requestStack()->getCurrentRequest()->request->get('foo');     $data['e'] = $request->request->all();     $data['f'] = $content;      $request = Drupal::requestStack()->getCurrentRequest();     $content = $request->getContent();     $data['g'] = $request->get('foo');     $data['h'] = $request->request->get('foo');     $data['j'] = $request->request->all();     $data['k'] = $content;      return new JsonResponse((object) $data);   } } 

Postman Request: enter image description here

Note: This was working before with this exact code, correctly using basic HTTP authentication. There have been no changes other than these variations to my controller, and core updates.

Any more ideas?

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