I posted a report on this last year & then when we had a update with the new mission. It just, it been a year & a few month on & there been no updates for this bug.
I just replace Space Hulk today only to face the same issue. You pretty "O" for the mine & it can become lock. No matter how many time you press L or R2, your not able to do anything, you can't use your weapon, you can't open doors. You just have the mine & press L2 cancel or R2 to place, on the screen.
I notice that this will also happen, when you try to hack one of the turrets & if you see your weapon ammo count.