PortDirection.Input doesn't set properties and deletes edges

[loosegrid]

Since the direction parameter was added I thought it would be possible to just hide the default input port and create a replacement to implement linked lists, but on entering play mode or deleting an edge, all edges connecting to custom input ports are deleted from the graph. When connected to a port list, the name of the list entry doesn't change, it seems the underlying property is never actually set.

Using Unity 2022.3.22