Copying and pasting javascript in advance actions not working

Hi

I'm using Captivate 9 and have recently run into a bug or something.

I've created a basic slide to allow me to test some Javascript. I have the Javascript working as it should, assigned to a smart shape button.

I wanted to add the code to a conditional action but when I copy and paste the Javascript in the script window inside a conditional action and select ok, then re-open the script window all the code has disappeared.

It's not a massive amount, but it would be quite tedious to type from scratch. I tried typing in a bit of code and closing the script window and then re-opening it and the typed code stays in. It seems if you paste code into the script window within a conditional action it doesn't stay there.

This seems really bizarre. Has anyone else had any similar experiences?