After a bit of testing, it would seem testing network stuff over Steam does not seem very co-operable whilst UE4 is running. For example, there was a lot of inconsistency with them being able to see my session. I made sure ports 27000-27050 and 7777-7778 were opened*(using online port checker always failed, software showed success however)*.
I added a loading screen for when a player tries to connect, sort of like a response as otherwise it’d just sit and either connect or not. If I have UE4 running in the background - the loading screen would be infinite. If I closed UE4, it would connect fast.
I’m not a specialist at this subject, but is this a bug or does it in some way make sense? Are ports “consumed” by UE4 whilst it’s running for network testing?
I am very confused… The inconsistency with the test app ID 480 does not help in any way either. 