Brake lever sometimes feel really soft and go all the way down to the bar, also some vibration on harder braking (CBR 1000 rr 2011 Combined ABS)

Hi there, Like it says in the title the brake lever sometimes goes all the way to the bar, and when I release it and press it again, goes back to normal. Does anyone know what this is and is this something that's normal for ABS models? Also like I mentioned it has some pulsing/vibration on harder braking. Would be interesting to hear what the problem could be? I bought the bike at 9000 KM, but never questioned these issues, since I've been riding GSXR 750 k5 previous to this with brakes much much worse. via /r/motorcycles https://www.reddit.com/r/motorcycles/comments/fdsca4/brake_lever_sometimes_feel_really_soft_and_go_all/?utm_source=ifttt