@seama It’s working, you just forgot to add this part – cat= ….you just had the 3 by itself.
So it should look like exactly like this when you add it in the name field –
cat=3
@Van double check your name field to see if your issue is the same. Not sure why that caption code is showing up. Do you have an image added to your content area of the Portfolio page? Or are you using a plugin somewhere that might be adding this in?