According to the UDN thread, a second listen server started on a machine will not process the travel URL correctly and fail to actually load a map in listen mode.
See UDN thread
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-66752 in the post.
| 2 |
| Component | UE - Networking |
|---|---|
| Affects Versions | 4.20.2 |
| Target Fix | 4.23 |
| Created | Nov 19, 2018 |
|---|---|
| Resolved | Oct 28, 2019 |
| Updated | Feb 11, 2020 |