Navigation makes ti.to widget disappear

[jmsv]

To repro:

1. Go to CovHack site
2. Click nav link to go to Hacktoberfest page
3. Click Home or use browser back button to return to homepage
4. ti.to widget has magically vanished

On refresh, widget is present again.

A hacky fix for links would probably be to use normal <a href="... rather than Gatsby Link components, although this disables the pre-loading stuff and the browser back button still has the same problem.

We probably need to find a way to force it to reload when the index page is rendered