Yes, FT, this one does if you weigh less than about 65kg.. So far, there's only one male pilot who has had to be re-assigned. The only female pilot is still flying, so she must be over that weight limit.
The problem with the lighter pilots is that it allows the seat to rotate too far forward at the point where the main chute is deployed. The higher amount of snapback risks breaking the neck. Martin Baker has come up with a three point fix, but I think it is still in the development/test stage.
First up is a panel behind the head, sewn between the parachute risers to limit the backward travel of the head. The next involves the addition of a computerised setting to compensate for body weight. I think it provides a longer delay for chute deployment for the lighter weight pilot, allowing more time for the seat to rotate rearwards. Not sure how that pans out with a zero/zero ejection. The third fix is to develop a lighter weight helmet. Good luck with that one.
It's an increasing problem these days. Building modern systems into the helmets increases the neck loading but our necks are no stronger. Even in times past, a helmet with night vision or target acquisition gear might have a safe maximum ejection speed of 100 knots less than the clean helmet equivalent.
Even with a clean helmet, the weight and design can have a big bearing on things. As an example, the Russian ZSh-7 helmet can eject safely at 100 - 150 knots faster than the American HGU-55P maximum.
I'd guess in the future, they'll come up with better systems to minimise the risk.
Cheers, Willie.