Index: binaries/data/mods/public/gui/gamesetup/gamesetup.js
===================================================================
--- binaries/data/mods/public/gui/gamesetup/gamesetup.js
+++ binaries/data/mods/public/gui/gamesetup/gamesetup.js
@@ -1347,12 +1347,10 @@
 		if (!("Team" in pData))
 			pData.Team = -1;
 
-		// Use default AI if the map doesn't specify any explicitly
-		if (!("AI" in pData))
-			pData.AI = g_DefaultPlayerData[index].AI;
-
-		if (!("AIDiff" in pData))
-			pData.AIDiff = g_DefaultPlayerData[index].AIDiff;
+		// Use default AI and playername if the map doesn't specify any explicitly
+		for (let prop of ["AI", "AIDiff", "Name"])
+			if (!(prop in pData))
+				pData[prop] = g_DefaultPlayerData[index][prop];
 	});
 
 	// Replace colors with the best matching color of PlayerDefaults