This is such a surprising bug, we've never heard of anything like this! Could you post some information about if you're playing on Linux or Windows, as well as more information about what happens before you get softlocked?
I'm on windows - I'm leaning towards this just being me doing something wrong but since it happened twice in a row maybe it's a bug?
Basically once I get to the part where you can choose to split up or not, the next fight starts with me getting my weapons locked out within the first couple seconds, and then even if you reboot your weapons system your weapons just get locked again immediately so it's not even possible to kill anything? I ended up having to mod the game to have infinite health to make it past that part [Outside of that the game is amazing!] - if you want more details I can give you them, I just need to know what specifics you're looking for