A licensee asked about SegmentLinks not working. These were apparently disabled because they were buggy and are waiting to be fixed, but not currently being worked on. Adding this to JIRA since there is licensee demand for it.
Answer from UDN:
"Segment to segment navigation links were buggy (especially when placed on tile borders) and we decided to disable them until there's some time for fixes. Currently it's not being worked on and there aren't any plans for them in near future.
You can try enabling segment links in editor by adding EditAnywhere and Category tags to uproperty and experiment a bit. Although it wasn't tested for over a year and probably will not work at all."
Japanese licensee UDN link for reference:
https://udn.unrealengine.com/questions/270124/
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-24061 in the post.