so let me explain the problem again

after T/O i activate the AP on LNAV AND VNAV, this also happens if its on HDG and speed + Alt on the MCP

anyways when i activate the AP the a/c starts banking at 45deg angle and then starts swing left to right etc when its on route and it doesnt stop


im not the only one with the problem , so you will be helping a few other people, please let me know what i can do to fix it without reverting back to 2.1