- don't let joystick/controller axis events register as a keypress for screen advancing.

source/common/inputstate.h

@@ -169,7 +169,10 @@ public:
 
 	bool CheckAllInput()
 	{
-		auto res = keyGetScan();
+		int res;
+		do
+			res = keyGetScan();
+		while (res > KEY_LASTJOYBUTTON && res < KEY_PAD_LTHUMB_RIGHT);	// Controller movement events should not register here.
 		ClearAllInput();
 		return res;
 	}

source/common/menu/menu.cpp

@@ -474,6 +474,7 @@ bool M_SetMenu(FName menu, int param, FName caller)
 		M_ClearMenus();	// must be done before starting the level.
 		if (caller == NAME_MainMenu) GameStartupInfo.Episode = param;
 		STAT_StartNewGame(gVolumeNames[GameStartupInfo.Episode], GameStartupInfo.Skill);
+		inputState.ClearAllInput();
 		gi->StartGame(GameStartupInfo);
 		return false;