I have a 2020 Triglide with 8600 miles and my front brake lever was going all the way down to the grip. The brake lever would pump up, but would go all the way down after sitting overnight. I saw a video where a guy showed pumping up the brake then pulling in in as far as you can then clamping the lever down overnight with pressure kept on the brake system. He explained that brake fluid won't compress but air will. Keeping pressure on the system will force any air to migrate out of the lines. I will be the first to admit that sounds too easy, but in my case it worked perfect. The brakes are just like when I first bought the bike. I don't know why air got into the brake but this seems to have solved the problem. I hope this might help someone having the same problem. Hey it doesn't cost anything to try.