Afew ideas, you could restart the server. Also, nodes can be deleted in two ways:
1. using the flyout with the Edit and Delete options
2. highlighting the node and hitting the delete key on the keyboard
As for not seeing the Route node branches, I don't have an ideas.
I have lost option to delete node in a workflow.
When I hover over the > I get some option depending on the node, but for all nodes I do no longer have the delete options.
For Route node I can not se the routes.
This is a problem