When I restart my server it doesn't recognize my mapgroup (console command: print_mapgroup see screenshot), as soon as the match is over the match voting starts and it shows the maps with "undefined". You can still select a map and it will then be loaded. After this map has loaded and you enter mapgroup, it suddenly recognizes the mapgroup mg_costum in my gamemode_server.txt and at the end of the match the maps are no longer displayed as "undefined".
I assume that it doesn't load the mapgroup when booting up, it only loads the correct mapgroup when changing the map. What can i do that the server instantly load my mapgroup mg_costum ?