Unexpected disconnection accessing Moment of Trauma after dying

Doing the Zana/Originator questline, reached the Moment of Trauma map.

Went in, died once, tried to go back in but was disconnected immediately on clicking the portal, and sent to the login screen.

After logging back in, tried again, same thing, also noticed the portals getting reduced as if I did get in the area and then logged off.

Tried changing the gateway from Milan to Frankfurt, but got the same thing.

Got one portal left, it'll probably be lost as well if I try accessing it.

Edit - after losing the last portal, I got more attempts, tried a few things, only twice managed to get back properly, the rest of the times the area was blocked and I had to remove all portals one by one to reset the attempt fully.

GPU - AMD Radeon RX 6700 XT
CPU - Intel i7-12700KF
RAM - 16 GB
Renderer - DirectX12
VSync - Locked
Triple Buffering - Disabled
Multithreading - Enabled

I think i have the same Problem, altough for me it already happened at quite a few different bosses (Moment of Trauma was one of them). I think i managed to narrow it down a bit further and got a video of the Problem:

https://www.youtube.com/watch?v=Y1sQFxfLz10

I played with CoD -> Portal before as i show in the beginning and in some maps i got the problem that after i died i could not reenter the map but got thrown to the login screen instead.
It doesnt happen everytime i die to a map Boss but it happened 3 times in a row when i wanted to get Ambomination completion.
Now i thought maybe theres a bug with CoD -> Portal but in the video provided i took CoD out before i even entered the fourth map you can see in the video since i anticipated the bug. I Went to the boss, died mid fight and reentered the map. To my surprise i could without getting thrown to the login screen but instead i cant go anywhere near it. The whole map is fine to play but as soon as i get to close to the boss its login Time.

EDIT: just checked your characters and im guessing this happend to you on your character Breazer? We are both playing KF selft cast Warden so i am quite certain it is a Problem with using a specific Skill we share in our Build at the Bosses.

What you're saying makes sense, especially with the triggered skill and us using the same build.

I'm not sure if I did it the first time I could go back into the portal, but the 2nd time I think I had replaced the Tornado linked to the Spellslinger skill with a Hydrosphere spell.

Since you removed the CoD skill and managed to get in but still couldn't get to the boss, maybe it's the Spellslinger + Tornado combo, likely in addition to proximity to the boss arena as the game probably has to render/get info on something that breaks.

In my case, the Moment of Trauma map is very small, and I probably portal in too close to the boss and get kicked out.

In your case, maybe when you couldn't access the map at all was when you created a portal too close to the boss arena (or in the boss arena, with CoD), and therefore couldn't portal into a "safe" zone.
Looking at your video, the distance to the boss when you're thrown to login is bigger or same as the Moment of Trauma map, I think.

Tried this again in the Moment of Reverence map, specifically died while Spellslinger + Tornado was active, and got kicked to login when trying to re-access the map.

After consuming all portals, switched to Spellslinger + Hydrosphere, died, and could go back into the map with no issue.

I have this consistently happen to me with Purifier fight under Maven witness. It aligns with what others say, after disconnect I can't rejoin Purifier arena only.
I also play Kinetic Fusillade Warden, but that's like the most meta skill this league.

I've tried 5 purifier maps, every time arena DCs me at random moments, can be 2nd phase, can be 3rd phase.

*I thought this might be because of Tornado. That would make sense that tornado messes the instance. Taken out Tornado from the build, instance still crashed exactly on 3rd phase of Purifier

Same exact issue for me. Also using KF with Spellslinger + Tornado

Same issue for me using KF with Spellslinger plus Hydro. March 26th.

Same issue for me. KF Warden. I can't progress elder guardians because I always get disconnected during the first mid-fight map transport. Reconnecting and trying to re-enter the arena instance always leads to getting booted to login screen with "unexpected disconnection" error.

I don't use MTX and this happens regardless of equipment, auras on / off, and Spellslinger reservation on / off.

Same thing also happened after deaths when fighting Incarnation of Neglect and Incarnation of Dread. Trying to re-enter the arena led to disconnections.

This is very frustrating.