stuck - EoS "defeating the kett" quest

I'm having the same problem.  Was in the middle of things, when NPC's started randomly going invis and warping through floors and walls.  I managed to kill them anyway, turned off the alarms, got to the room with the round hole in the ceiling directly below the Command Center, and for some reason, there's no way up.  Everything's dead, no fighting, no alarms, nothing to do but run around.  Saved the game, rebooted, and still stuck.  Dang.

http://answers.ea.com/t5/Bug-Reports/Kett-Base-on-Eos-cannot-enter-Zenith-Observation-Room/td-p/5944074/highlight/false

I had a similar problem before when i was on Voeld. When i was in the Remnant Vault i couldnt progress because i killed everything but it was still saying i was in combat. I fixed this by making sure i didnt kill anything with Biotics.

If you can still reload try going through it again but if you use Biotics just refrain from using them, i know they are overpowered and its fun but its what got me out of my jam.
Hope this helps, made an account just to reply 🙂

Same issue here, although I did defeat the Invictor and got to the observation room to finish the quest. On my way back however, I got killed and the auto save put me back right after the point the Invictor was killed. The additional items and stuff I got from the observation room were lost. Now no longer a way back through the door that was opened previously after having killed the Invictor.

Strange things have started to happen after having tried for a long time to get that door to open again. I ended up having a 'new' Journal entry showing, but going through the full Journal will not make this disappear. The Kett continue to spawn and fight me in each section of this base, although this may be intentional. Often the Kett are able to shoot right through objects as well, which not only happens here by the way. I got some weird floor or huge black slab to show up which was not there before and should not be there either (see image). Moving away from this base did not allow me to save for a long time, I was still in combat even though far away from everything. Later on, after picking up on new quests and going other places, the map for this base kept showing up, even when I went inside another of these vaults, which was nowhere near the base for 'defeating the Kett'.

Eventually I have been able to save again and besides a stuck 'new' Journal entry all seems back to normal again. I guess I was at least lucky enough to have finished the mission.

This is honestly the most bugged mission I've encountered yet. I made good progress, comming from outside, getting in, disabling the shields, and then I got kinda lost trying to disable the alarms.

I was killed, and it reloads me on top of a huge building, shields not disabled, yet alarms going off everywhere. All the enemies I previously defeated before disabling the shields, have respawned, and the loot I meant to pick up on my way back is now gone (actual containers I hadn't openned, are now empty).

And I can't reload a previous safe that's anytime between these things unless I want to completely start over from outside. When I try to disable the alarms (yes all 3 of them), they just keep on going and SAM keeps yelling at me "Disable the alarms pathfinder" or "Shuttle incomming". SAM pls...

I even accidentally dropped down from the top, and got spawned all the way back on Site 1. I mean wtf :D it's so completely clunky and messy I can barely bring myself to play the mission again. 

I'm having issues - I have "Clear out the remaining defenders"... except there aren't any and nothing else after beating Invictor.

Definitely bugged. see also bug report: "Kett Base on EoS cannot enter Zenith Observation Room. Additional problems.

After a several waves of invisible Kett with infinite spawns. While I finally finished (Kett sure repaired those front guns fast), hopped into the Nomad, drove off into the sunset and it won't let me fast travel - "in battle" it says, even though I'm kilometers away from the generator - and of course, IT WON'T LET ME SAVE YET... WHAT A POOR DESIGN DECISION... I've already had several corrupt autosave files that go on infinite load and I have go to a previous file.

At times, the game doesn't provide proper locations of where to go for the next stages - ran around lost quite a few times with no clue as to where the next stage should be.

EDIT: So I went back to the generator - fully populated (again), front guns repaired (again) - don't know how many time you have to kill these before the game lets go. Will do one more round of it and give up - wished I knew it was such a severe problem and will skip it on my next character. Still can't save, fast travel. What an annoyance...

EDIT: Killed them all. Still can't fast travel or SAVE. I used T to go off planet. When I checked the missions, "Defeating the Kett" was completed, thankfully, but I never really got that impression. Still a place I won't visit again until I know for certain it's been patched.

Thank you for the posts. We have seen a solid number of reports on this. The main ways to bypass the issue if you encounter it are to reload an earlier save if that's an option, or to leave and return. 

Those aren't ideal workarounds and hopefully we'll have an update on this soon. 

"I'm having issues - I have "Clear out the remaining defenders"... except there aren't any and nothing else after beating Invictor."

Hey there,

this happened to me from time to time and usually its caused by enemies spawned/stuck underground or thrown from your ground level by any skill/explosion to lower level and then unable to come back to attack you, so look around. Enemies stuck underground can be found using scanner and then killing them by some skill that can traverse obstacles f.e. biotic Shockwave etc.

GL