Find Sessions works in 4.27 but not in 5.3

[Swick94]

Hi
I made a multiplayer project last year or so in 4.27 and today tried to continue it on 5.3.
Though the find session node fails. I reopened the project in 4.27 and there it worked again.
Does anyone have any suggestions?
Sorry if posted under the wrong section.
Thanks

[Swick94]

Okay found the issue myself by accident.
So in older versions of UE, the max player amount I had set up as default (10) reads as 0 in UE5. So if I do not change it before hosting, the game was unable to find the session for obvious reason cause the max player amount appeared to be 0 though it was 10 as default.
Strange, seems like a bug.