Issue with sourcemaps when debugging?

[chris-tuncap]

Hi! I am trying to debug mosaico using dev tools in Chrome.
I am seeing the original code fine but I am unable to breakpoint certain lines.

[bago]

Thank you for reporting, it was a bug in the build tool handling of the banner (grunt-browserify).
Moving the banner to a later step in the build (uglify) fixed the issue.