when using the neos link editor for creating a simple link in a textblock, looking up the the target node by searching and saving it, the node is not converted to an uri. The link contains the node identifiier, like this: node://2d424117-926f-4300-945c-706df6b39b69.
See:
No special configuration is done, all neos default.
Neos: ~4.3.0
Neos-Ui: ~3.3