I also have problem with disappearing Morph object while modifying.
The strange thing is that few hours ago everything worked fine in OpenGl mode with "Ignore hardware acceleration in 3D window" turned on. Now it doesn't help anymore. And working on internal engine is bit too slow.
Updating graphic cards driver led to complete crash of AC16 and it did not launch at all.
Please, fix it as fast as possible. Morph tool is crucial tool for AC 16 and it eases work in many fields, especially while doing interior designs.
Archicad 16, Win 8.1