This same happens to me on the mission Adapt - Beyond Recognition at the part where you've destroyed the first place and cleared the second at the point where the special force troops attack. After the gun locks up you can't interact anyway with your inventory and only thing you can do is move your character. This happens within few minutes after loading the Auto save.

I recorded a small clip demonstrating what happens, here:
https://www.youtube.com/watch?v=X1Y159i2020