Hi Jack,
I faced a similar problem and found that there are two ways to save callbacks: either within the mask or in a separate callback file. It is possible that your Mask Editor is set to "Callback file" under "Switch Callback Mode." If you change this setting to "Mask," you should be able to edit the initialization code directly in the editor. I have attached an image to guide you through this process.
I hope this helps resolve the issue!
