GameMode: Begin Play Issue

Hello!

If have finished a little mod, which uses the TestGameMode (both tested as a child and a copy). In this GameMode i use the BeginPlay event for setting up a few things.
This works on all maps, but not on “The Center” map. I think “The Center” uses another GameMode, but not the TestGameMode.
Is there another way for globally setting things up so the mod is a “green” mod and does not use the GameMode at all?

Edit: after searching the TheCenter.umap i found a name “CenterGameMode”