I got my ebike (scooter) this year in spring. haven't used it in the summer since I was away. Its really useful. however I've been having a problem with it since the fall. The front brake suddenly got really weak. Every time I use it, the bike shakes and it slows it down very very slowly. Another odd thing that happens is, the suspension gets literally pushed down, and gets stuck every time I use the front brake. When I use the back brake its fine.. Like, the suspension gets lowered and stays like that. I have to manually bring it back up. I don't know why it does this, or how to fix it. I never crashed or hit a bad bump or anything of the sort? Any idea on how to fix it?