BUG - Nav bar links broken

[harrietc52]

Describe the bug
Nav bar links are easily broken

To Reproduce
Steps to reproduce the behaviour:

1. Go to page Lighthouse UI UAT
2. Click on button "Print labels"
3. Click on any of the nested printing tabs
4. Click back on button "Print labels"
5. url is http://localhost:3000/print_labels/print_labels and Page cannot be found