ES6 template literals and JavascriptFold() combined brake syntax highlighting for rest of file

[Bangsadrengur]

I've just recently started using ES6 syntax and template literals are breaking syntax highlighting for the rest of file when I have the following line in my .vimrc
au FileType javascript call JavaScriptFold()

Disabling folding removes the problem.

When folding is enabled:

When folding is disabled:

[Bangsadrengur]

Minor error in my demo code, missing parenthesis in proceess.cwd(). I does not affect the highlighting though.