🐛 BUG: Category doesn't show items / filters can be used that are not available in that category

[jurjendevries]

Describe the bug
A category can be empty while navigating to it or when selecting a filter that isn't related to the products in that category.

Steps to Reproduce
Steps to reproduce the behavior:

1. Go to https://dilmahtea.me/en/tea/
2. Click on the filter dropdown with 'All tea variants' or 'All tea sizes' and select one that is not related to elixer such as 'Loose leaf'
3. Click on Elixer category
4. See an empty result

Expected behavior
I would expect to see at least items related to the category, or a notification that there are no results for the filter given.

Screenshots

Desktop (please complete the following information):

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Smartphone (please complete the following information):

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Additional context
We should discuss the solution to fix this.