Hi, that chest is the only one bugged I think, I'll fix that on the next update. Thank you for reporting the bug
Second bug, when you reach the end of the current version you can use your plasma gun inside of the Safe Sector, or at least i could.
I like the game quite a lot, only thing missing is the sleeping pictures when your character is pregnant (i mean in some you should be able to see it, just as an idea, if it costs too much forget that i said anything ;) )