Steps to reproduce the issue

Go to Components - Smart Search
Index the content (like examples)
Go to Search Filters and create a new one.
Click on "Search by category - xx (look at attached picture)
If You touch the checkbox it works, but if you touch a label the first checkbox is marked and not the one you check

Expected result

The checkbox of the label you click should be marked.

Actual result

The first checkbox is marked.

System information (as much as possible)

Latest release of Joomla (3.8.6) PHP 7.0.4 on localhost

Additional comments