Note: i have not yet had an opportunity to test if this is a reccuring issue
Upon taking off from LIRF less than an hour ago, in the 742, i noticed weird behaviour from the LNAV
My FPL took me straight out of RWY25, and then N/NW towards Nice (basically diagonally up and to the right). Upon turning it on, instead of a slight correction to the right, AP turned fully to the right.
Long story short i turned it on and off a few times, thinking it had something to do with the active leg of FPL. After that didnt work i continued switching active legs on the FPL and eventually i just let it turn.
It ended up turning straight north. Turned to 360 and maintained.
Even longer story short, i think i tried almost everything in a span of a few minutes. On off like 20 times, switching legs, VNAV, inserting waypoints into FPL, deleting FPL and building new one etc… you get the point.
The one thing i did not try was just reloading, which is why i have the note at the top. Ill give it a few goes in the morning, until then if anyone knows why this was happening let me know :)