I choose not to throw the bomb inside the vent, it throu it anyways. after it got stuck with "enter the bunker".i tried to relog in the middle inside the bunker, so maybe that why it got bugged, but i had it stuck there, with 2 Rytloks standing inside.i restarted the mission from the last checkpoint- and now i can't interact with the submarines, or with the weapon i need to fix at the same phase..couldn't find any solutions on the previuse threads. :/