Active Crossover Linkwitz-Riley 12dB for BiAmping

I have this crossover f=2510.
Then I have added 2 allpass with delay 150uS in the highpass.
But the Phase curve for the HP looks a bit strange.
Is there something wrong?

the hp and lp filter complement each other, and no delay is needed
but when you add the drivers, then the phase relationship is spoilt
add drivers in your sim, represent them using 2nd order hp filters