It is a Dell Latitude E6410. I can't find the SKU. The windows version is Windows 10 21H2 (10.0.19044.1806), and yes, the issue still happens, even with an external USB keyboard.
Has of the past 2-3 days my laptop has been having input lag randomly in games like Minecraft. Everything else if fine with the keyboard, except Minecraft, does anyone know what the problem could be?