Fix #3234

client/lobby/RandomMapTab.cpp

@@ -107,6 +107,10 @@ RandomMapTab::RandomMapTab()
 	groupCompOnlyPlayers->addCallback([&](int btnId)
 	{
 		mapGenOptions->setCompOnlyPlayerCount(btnId);
+		
+		// deactive some MaxPlayers buttons to prevent total number of players exceeds PlayerColor::PLAYER_LIMIT_I
+		deactivateButtonsFrom(groupMaxPlayers.get(), PlayerColor::PLAYER_LIMIT_I - btnId + 1);
+		
 		deactivateButtonsFrom(groupCompOnlyTeams.get(), (btnId == 0 ? 1 : btnId));
 		validateCompOnlyPlayersCnt(btnId);
 		updateMapInfoByHost();

lib/rmg/CMapGenOptions.cpp

@@ -70,7 +70,7 @@ void CMapGenOptions::setPlayerCount(si8 value)
 	assert((value >= 1 && value <= PlayerColor::PLAYER_LIMIT_I) || value == RANDOM_SIZE);
 	playerCount = value;
 
-	auto possibleCompPlayersCount = value;
+	auto possibleCompPlayersCount = PlayerColor::PLAYER_LIMIT_I - value;
 	if (compOnlyPlayerCount > possibleCompPlayersCount)
 		setCompOnlyPlayerCount(possibleCompPlayersCount);