test-case-history-bug

Test URL : https://confident-goldstine-20bc0e.netlify.com/
Repo : https://github.com/a-botermans/test-case-history-bug
How to reproduce :
1. Click on News Item 2
2. Change URL manually into /blog
3. Click on Blog Item 2
4. Use Browser back button you end up on News Item 2

I have now upgraded Gatsby to version 2.19.16 and the bug is fixed.