This could be the game itself and it could also be an exploit being used by Raiders. Either way, you can attempt to disconnect and reconnect. You 'will' lose time but it doesn't mean you'll fail. The exploit in question regards all Raiders disconnecting and then reconnecting to mess with the Antagonist's spawn as I do believe this was never patched. Another reasons could involve extreme cases of lag as nearly every horrific glitch I've seen seemed related to lag in some manner. You can check your Ping by going into Settings and it will be under Game as Show Technical Info. Hope that helps!