Steps to reproduce:

1. Create an article, and in an XML block field (e.g. "body"), add an image and then add an external link to it. In this test, this was the generated code, as seen with the editor disabled:

<link href="http://www.google.com/"><embed view="embed" size="medium" custom:offset="0" custom:limit="5" href="ezobject://97" /></link>

2. Visualize the article in a frontend SA, configured in new stack mode;
3. Inspect the symfony log. The following error is listed:

[2017-02-07 16:18:13] app.ERROR: Could not resolve XmlText embed link resource type and ID [] []