Copy / pasting from 'Notes' moves tasks across Lists; 'Undo' options
When copy / pasting some text from 'Notes' in a task from List 1 to a task in List 2, Todo actually moved the entire task into List 2. The text successfully appeared in 'Notes' for a task in List 2, but it was not clear that the whole task had also been moved from List 1. I assumed it was a duplicate, so I accidentally deleted the task. By the time I had realized that it was not a duplicate, the notification to 'Undo' the deleted task had disappeared.
Why does copying text from 'Notes' move tasks across lists? Also, is there a more persistent option to undo operations, like 'Delete', in Todo?
On an Ubuntu 16.04.6 LTS machine