At the 19:00 minute mark he drops his phone in the lake and jumps in after it and his Mustang PFD did not deploy
Now he didn’t go that deep but the water was over his head and you would think it should have deployed
Some things I noticed
He did some strange editing as he was wearing it for most of this portion yet the scene just before he wasn’t wearing it
Next note the way he jumps in – like he’s doing a cannonball
He wasn’t able to climb back in from that side and clearly had to go to the back of the boat