Line and block comments not working for html files

Here is the result of the ctrl+/ shortcut in an html5 file:

{{/*to be commented*/}}

Here is the result of the ctrl+shift+/ shortcut in an html5 file:

{{/**/}}*to be commented

How can this be fixed back to 

<!-- -->

The file is well recognized as an html 5 file and suffixed with html.

Thank you.

Best regards,

Brice