Vectonator V 4.13.2
You can do a bolean operations like “subtract” or “unite” with two objects if they are outside a group as expected without any problems.
If you do de exact same operation but this time the objects are inside a Group, the resulting curve disappears, no object is created in the Layers panel. Yet briefly you can see the selection outline of the resulting path/curve which disappears as soon as you click on something.