Interesting. I'm wondering if I broke my 4th gear shift fork pad. All my gears feel fine, but when I push the shifter to 4th, there's nothing there. It doesn't grind, it stays in gear, but there's no 'click' or feedback that it's actually in gear. I can still race the car and and drive it hard but shifting to 4th just feels different now. Something happened but I don't know exactly what...
When the clutch is out, there's normally resistance when you push the shifter to a gear but now if I push to 4th, there's no resistance and the shifter moves pretty much all the way into gear without much fuss(with the clutch pedal not pressed)