Importing sub flows. Something isn't working

[Trying_to_learn]

Update:

I tested exporting a sub-flow and re-importing it.

It doesn't work. ie: links are not honoured.

Walk through:

input node. ---> change node. --> link out node. ----> link in node --> output node.

(Not rocket science)

I exported the flow to the clipboard.

Renamed it to 3 O

Imported it and you tell me.

Is this a bug?