Attachments in description field don't sync when using new issue view

You can add attachments in the description field, these should be synced as well. However, when using the new issue view, the attachment doesn't get synchronized from the description field. 

Steps to reproduce:

1. Create an issue 

2. Open it in the new issue view

3. Add an attachment in the description

4. Open the synced ticket in the new view -> "failed to load"

5. Open the synced ticket in the old view -> "Unable to render embedded object"