Let's Encrypt addon - SSL URL Padlock

Hi

I’m giving hass.io a test run and have set up let’s encrypt and duck dns… i must admit it’s AMAZING.

i tested the SSL connection on https://www.ssllabs.com and it scores and A which is great. i wonder why it isn’t an A+ but it’s probably not a very big deal.
In my Chrome browser i can ofcourse access the page through HTTPS but the padlock in the URL bar doesn’t show up… Is there a way to fix this? is this a common thing for everyone else using it?

Thanks