Canvas Developer Key Deployment Bug

[creichling]

When I add an LTI Developer Key and set "Homework Submission" as a deployment, for some reason it doesn't show up when I'm creating an assignment and do try to set the submission type to an external tool. The odd thing is, I have had times that it works and times it does not. Am I missing something in my configuration or is this a bug?

Here is the configuration:

{

   "title": "CHANGE ME — this will be the title of the WebCOM app as it appears in the Canvas integration",

   "scopes": [

      "https://purl.imsglobal.org/spec/lti-ags/scope/lineitem",

      "https://purl.imsglobal.org/spec/lti-ags/scope/result.readonly",

      "https://purl.imsglobal.org/spec/lti-ags/scope/score",

      "https://purl.imsglobal.org/spec/lti-ags/scope/lineitem.readonly"

   ],

   "extensions": [

      {

            "platform": "canvas.instructure.com",

            "privacy_level": "public",

            "settings": {

                  "platform": "http://canvas.instructure.com",

                  "placements": [

                        {

                              "placement": "homework_submission",

                              "message_type": "LtiDeepLinkingRequest"

                        }

                  ],

                  "tool_configuration": {

                        "placement": "tool_configuration",

                        "message_type": "LtiResourceLinkRequest"

                  }

            }

      }

   ],

   "public_jwk": {

      "e": "AQAB",

      "n": "removed",

      "alg": "RS256",

      "kid": "removed,

      "kty": "RSA",

      "use": "sig"

   },

   "description": "Launch into WebCOM",

   "custom_fields": {},

   "target_link_uri": "https://www.xx.com/index.cfm/core/tool",

   "oidc_initiation_url": "https://www.xx.com/index.cfm/core/oidclogin"

}