wow. all that work by geniuses to get us to go forward..of course reverse has no synchro. you need full stop. some clutch setups even have a brake to stop it...just for reverse. that is the synch for reverse...no movement at all.
autos squishy squash there way around with hydraulics (it proves how inneficient they really are: drop it in reverse while moving forward).
I wouldn't be letting you drive my old 10 geared subaru no doubts...