Detector Rail powering a Activator Rail to derail don't work one way

I try to build a train station, where incoming players get ejected by detector rails powering activator rails. (see screenshot 1)

This mechanic should work only from one way (incoming from right) and allow player to ride unaffected over the rails coming from the left direction.

But the minecart shakes too, if it rides over the activator rails first and then over the detector rail.
If the cart's position is half over the activator and half over the detector (coming from left) the cart shakes. To early in my opinion.

Can this be fixed? So that the detector only powers rails in front of it?

Edit: The only workaround, is a delay between detection and derailing, to work from only one direction (screenshot 2).

Sorry if this was reported already: I searched and it is similar to MC-868