Hello, @stewart.gilmour
Thanks for reaching out.
Seems like you are creating your application on the New responsive Engine.
Unfortunately, the plugin editor is not yet compatible with the New Responsive Engine. The Bubble has confirmed that a new plugin editor engine is under development and has top priority. We will migrate all of our plugins to the New Responsive Engine as soon as we have a chance to have them work properly on it. Here is the announcement from Bubble: Plugin Editor & New Responsive Engine [beta]
Can you please elaborate more about the Kanban Board and its settings? It will help us to investigate this issue in more detail.
Also, I will test the plugin behavior on the New responsive Engine and will check that is possible for this case 
Best regards,