Strange things happens when updating the plane and starting direct on the runway:
IRS is aligned and switched to nav mode automatically. The FP is imported into the INS and shown on the screen. WP 0 to 9 are set. But now, after engaging the AP and INS mode in flight the plane does not follow the FP. Changing waypoint tracks 2- 3 or 2- 5 as a "direct to" has no effect. The plane keeps it initial heading. Using the GNS and setting Navigation to VOR FP will be followed as it should do.
I’m lost. May you have some hints.