Responsive scale bug - Safari?

Hi - Thank you for any insight in advance.

I’ve created a contact form at the bottom of the page: I’ve noticed that when I scale my browser in safari, it behaves as expected (few kinks to work out still) but what I’ve noticed is that when I scale my browser back up, it stays fixed in it’s last size state.

When I refresh, it pops back to the correct size, when I view in Chrome, it behaves as expected.

Anyone know what’s going on here? Is this something I can rectify?

Here is my site Read-Only: LINK