Had five mins with this on my 030 A1200. I did not RTFM so apologies if these are obvious user errors.
1. If the character gets into a corner like the ramp just above the plane crashh site, then the other survivors block him in and he cant move. I had to restart.
2. If the lead character goes over the cliff edge, the other characters still ask him what to, but then just stand there. I had to restart.
3. At the beginning, there is a bag near the plane and supplies just north of the ramp. If the main character approaches the supplies he gets the option to pick up the supplies and the bag that is on the other side of the ramp. If you choose to pick up both he gets stuck trying to walk through the ramp to the bag.
4. There are glitches that appear to be remnants of the inventory window.