R-Tillery

Hey all just want to say hi and ask a question about Privet Military Company. I Co Op with a friend on it but it’s a real glitchy game. I can see and stand on things that my friend can’t see. Like a pile of rubble and blocked pathways. Also in the coop we reach our objective to find a comrade and he is not there. Any suggestions on how to fix any of this? Thanx.