Do some items don't work with /castrandom or is there a problem with my macro?

I run a weekly fireworks show and at this moment I have a hotbar full of all of the rockets you can use with launchers and cluster launchers. I had the idea of using /castrandom to shorten the bar, as well as make it a fair variety of fireworks, but the the cluster rockets/large cluster rockets don’t work. The smaller varieties work, but for some reason the macro will, at best, go off a few times then stop.

Anyone else familiar with /random who can help?

have u tried it with item:itemid rather than the names?

Not a bad idea, but no dice.

What are all the items you’re trying to use in the castrandom? I’ll buy them and try and trial and error it