No, can't say I do know the exact distance inside a waypoint that causes the legs not to sequence. I've had it happen to me in the past and from memory it had to be maybe 2 miles? I'd must be written somewhere in the FCOM 1?
It's mentioned in training and all F/O's I fly with are aware of the trap
Just keep an eye on the top right of the ND for the active waypoint.
Especially since the latest Boeing software update automatically gives you Lnav after pushing TOGA on a go around.