Dynamo no longer able to be undone in Revit?

[Jonathan.Olesen]

Searching ‘‘2.0 delete’’ gives you this as the first hit:

Can't delete nodes in Dynamo 2.0.1

Since. i’ve installed Dynamo 2.0.1, I’m unable to delete nodes using the delete button. The only way I can delete nodes is right click and remove. Is this a known bug?