Loaded into vondel solo and got blindsided by a trio who eventually rezzed me. I joined and we killed the Pyro, hunted a squad, and chased the bullfrog but anytime I tried to use their ammo box this one guy would shoot it first, I gave them mine more. I got downed once at the end and the guy kept tapping the button and stopping and 2 of them watched me bleed to death, rummage through my stuff a 2nd time and headed to exfil, I had to wait for the initial guy that rezzed me to catch up and get me. I just don't get the point of giving your teammates a disadvantage and behaving hostile.

Edit: when I joined it checkmarked kill Pyro so I just assumed, probably a bug