i thought only my car didnt do this, my friends 2 lancers wont go in.
and my EG wont go in either, ive tried rev matching (from second to neutral blip throttle and try pushing her in) but nothing happens at all rpm levels.
I've noticed its easier if u go straight in from 2nd. so when your slowing down quite slow and in one motion; clutch in and push the stick from 2nd into 1st without waiting in neutral.
usually works at speeds below 15km for me.