Qplane 4.1.6 transition ondulation issue and land speed issue

Hello, I try to smooth the transition, but it’s realy woble…

You check below flight log and print screen showing airspeed / vs gps speed / vs pitch over the landing point.

Also I have issue on the landing speed.

I set q_land_final alt to 6m, but it slow it’s descent 47m above ground…
below print screen showing relative home alt vs VZ.

Can you help me to find what cause this trouble?