When creating multiple instances of the same template, we hit an issue with selectors inside those templates conflicting. I discovered this while creating the the video, image and sky templates, which use <video> and <img> elements plus IDs / classes.

I had a bunch of image template instances. Each with a unique src image specified. But they were all showing the same image. Because each template instance contained an instance with the same id="image".

Solution would be to encapsulate selector scope to template? Or randomize template ID/classes?