VNAV PTH tested again today on the ALBET2E ILS4R-Z (LAREN) approach at LIPZ (Venice).
the FMC PATH calculation is totally messed up, leading to continuos climbs and descents btw waypoints (particularly btw waypoints with WINDOW alt constraints).
Furthermore, after manually setting an hard FMC constraint of 4000ft on LAREN, the vertical path purple indicator started flickering up and down and autopilot almost killed me trying to chase it!
I m afraid, but i confirm that this VNAV is definatly broken:disappointed_relieved: