Dynamic Field output in twig breaks Live Preview

[Tim-Wils]

Outputting the field in twig breaks the Live Preview functionality and gives an error.
The problem is that the field needs to be json_encoded in the Live Preview.

To workaround this problem, this is a fix on the twig-side:

{% if craft.app.request.isLivePreview %} {{ myDynamicField|json_encode}} {% else %} {{ myDynamicField }} {% endif %}