Ok, I bit the bullet and decided to finish the prologue. I wasn't able to kill commander Zhalk because the game just hates this fight.
After finishing the prologue, the game started to work perfectly.
Conclusion: patch 5 broke the Nautiloid section in my case.
If it helps: I rescued Shadowheart from the pod.
Last edited by Padzi; 20/07/21 03:44 PM.