This is a follow-up to this topic: https://xtemos.com/forums/topic/filters-duplicate-selections/
Unfortunately, the provided patch in that topic, didn’t fix the bug. It’s still there even in the staging site I posted in my second post on that thread. So, to sum up, the steps to reproduce this are:
1. Being in any category, you can use the Categories drop-down to move to any other category.
2. Use the Back button in the browser to move to the previous page.
3. The label in the Categories drop-down still shows the second category, and the Price filter shows a range of 0 € – 0 €.
The key here is the Back button; I think you should force a complete refresh of the page (there are plenty of techniques to do so) when using it.
Regards.