UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.101 Safari/537.36

Example URL:
https://www.jerseytravel.com/

Steps to reproduce the problem:
1. Go to Jerseytravel.com
2. Search for a holiday and get results
3. Press F5 to resubmit the form. Comes up with error messages instead once you proceed

What is the expected behavior?
For the browser to repeat the initial search, and come back with the same availability screen

What went wrong?
It is resubmitting the form without any of the entry details from the previous page it seems

Does it occur on multiple sites: Yes

Is it a problem with a plugin? N/A 

Did this work before? Yes 

Does this work in other browsers? Yes

Chrome version: 60.0.3112.101  Channel: stable
OS Version: 10.0
Flash Version: 

This morning Chrome errored when running with "Side by side configuration error". A re-installation fixed this. Now this issue is happening. It also happens in Canary, but no other browser that I can see