As described in the UDN question, some settings aren't forwarded correctly to the game instance in PIE during a functional test.
Proposed patch attached.
No steps for repro
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-76716 in the post.
| 0 | 
| Component | UE - Networking | 
|---|---|
| Affects Versions | 4.22 | 
| Target Fix | 4.25 | 
| Created | Jun 21, 2019 | 
|---|---|
| Resolved | Aug 21, 2020 | 
| Updated | Mar 30, 2021 |