Haven't been able to find out any answers to this so far but I'm trying to use handlebars within tumblr's theme system and it looks like my {{variables}} are getting overwritten from tumblr and then my content is never displayed.
For example my handlebars template has
<img src="{{bgimage}}" class="img-responsive">
But it will output as
<img src="{}" class="img-responsive">
So it looks like tumblr is just removing it. I have seen others use handlebars within a theme however I just can't figure out how they got around it. Any help would be awesome, thanks!