{"action":"closed","issue":{"url":"https://api.github.com/repos/react-bootstrap/react-bootstrap/issues/1575","labels_url":"https://api.github.com/repos/react-bootstrap/react-bootstrap/issues/1575/labels{/name}","comments_url":"https://api.github.com/repos/react-bootstrap/react-bootstrap/issues/1575/comments","events_url":"https://api.github.com/repos/react-bootstrap/react-bootstrap/issues/1575/events","html_url":"https://github.com/react-bootstrap/react-bootstrap/issues/1575","id":123354649,"number":1575,"title":"Collapse not initially hiding Custom Element","user":{"login":"banderson5144","id":2395774,"avatar_url":"https://avatars.githubusercontent.com/u/2395774?v=3","gravatar_id":"","url":"https://api.github.com/users/banderson5144","html_url":"https://github.com/banderson5144","followers_url":"https://api.github.com/users/banderson5144/followers","following_url":"https://api.github.com/users/banderson5144/following{/other_user}","gists_url":"https://api.github.com/users/banderson5144/gists{/gist_id}","starred_url":"https://api.github.com/users/banderson5144/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/banderson5144/subscriptions","organizations_url":"https://api.github.com/users/banderson5144/orgs","repos_url":"https://api.github.com/users/banderson5144/repos","events_url":"https://api.github.com/users/banderson5144/events{/privacy}","received_events_url":"https://api.github.com/users/banderson5144/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-12-21T20:46:44Z","updated_at":"2015-12-21T21:09:32Z","closed_at":"2015-12-21T21:09:32Z","body":"When I have it like this:\r\n```html\r\n<Collapse in={this.props.open}>\r\n              <div className=\"slds-size--1-of-1 slds-large-size--1-of-1\">\r\n                <div className=\"slds-notify slds-notify--alert slds-theme--success slds-theme--alert-texture\" role=\"alert\">\r\n                  <span className=\"slds-assistive-text\">Success</span>\r\n                  <h2>\r\n                    <span>Company Saved!</span>\r\n                  </h2>\r\n                </div>\r\n              </div>\r\n            </Collapse>\r\n```\r\nThe initial rendering is correct and everything is hidden until I change the ```in``` attribute. However, I if I move the inner content into a custom element, it is not hidden.\r\n\r\n```html\r\n<Collapse in={this.props.open}>\r\n    <NotifyEl/>\r\n</Collapse>\r\n```\r\n\r\nAny reason why this would happen"}}