Other empires can "steal" your event? (Ouroboros)

[Bl4ckSh33p]

1. What platform are you using?
- Xbox Series X

2. What version of the game are you using?
- 6.1.0.0

3. What DLC do you have installed?
- All DLC

4. When did this start happening?
- a new system popped up connecting to my starting cluster. I surveyed it and got the Ouroboros anomaly. It seems my AI neighbor triggered the event (shoulders of giants?) and now I can continue it. I have the doomsday origin and its already about 2270.

Is this intended or a bug?

5. Can you replicate it, if so, please explain how
- not sure yet

6. Does this happen on all saves or just specific ones?
- not sure yet

7. What steps have you taken to try and solve this yourself (reinstall, Google error code etc)?
-

 

[Bl4ckSh33p]

After I claimed the system and finished the anomaly project, I got a dig site (which is shown twice in the radial menu).

A few days later I got a notification and the "Full Circle" empire modifier.

So I just stole the event without any prior knowledge of it. This is a bug, right?