What happened?

1. Go to your Global Configuration > System > System Cache and set "On - Conservative Caching"
2. Open a category blog page, whose articles use tags.
3. In the url of that category blog page add a tag filter. e.g. http://localhost/my-category?filter_tag=2

The tag filter is ignored.

Try the same with System Cache > OFF - Disabled and you will see that it works

Version

5.4

Expected result

The category blog to return the articles based on the set tag filter.

Actual result

Ignores the tag filter

System Information

J5.x

Additional Comments

I can provide a fix with a PR if there is a will to get fixed