I tried waiting about 5 minutes (I thought Viper Green was going to show up eventually), started shooting at the water with my gun and got killed by curios enemies... ally didn't even respond to enemies standing next to him

Edit: 3rd time I've tried, still no luck.. my ally is actually floating above the ground, it looks like he is standing but his feet are waving in the air... Also tried shooting him in the foot, he doesn't even feel it, also had to try bandaging him a few times before it actually worked