Thanks for replying. It’s okay, i finished the game on Saturday and when i started a new game it didn’t happen again. But I found out that for some reason it fails whenever you talk to Ellie about the events on Monarch. In order, what happened was:
1. Finished main Monarch quest by making peace between MSI & Iconoclasts
2. Landed on scyllia and accepted Felix’s quest (it didn’t immediately fail, at this point it was working fine)
3. Talked to Ellie about the events on Monarch. Towards the end of the conversation, i was notified that Felix’s quest had failed.
I reloaded the save and tried it again and no matter what response I chose, at the end of that conversation with Ellie, Felix’s quest fails. And I can’t think of a reason why that might be.
In the end i just didn’t talk to Ellie until i finished the quest. I hope this information somehow helps fix the issue.