Legion duration bug

It happens sometimes on my maps: I'm activating the legion, im starting to kill all the monsters, i can see the boss and its hp bar, then, suddenly hp bar just disappears, legion activates even though the timer showed around 15 seconds.
Here you can clearly see the problem from the same map:
1. https://streamable.com/2ffn73
2. https://streamable.com/4gx7dp - around 0:15 you can notice for a very brief boss hp bar just disappears and boss not spawning after activation.

I was running gilded legion scarab on this map, and still legion did not spawn any bosses after activation.
My best guess is some kind of explosions bugs legion encounters.

Yep Happens to me aswell. I only noticed that when started using Oriath's End flask.

Same happens to me aswell

https://www.youtube.com/watch?v=2ttXBkNFUqA

Having the same issues. Legions keep popping early with 8-10 seconds on timer remaining with plenty of things in stasis still.

Bugged for me too

https://www.youtube.com/watch?v=WtqmZLYC-iA

Also happening to me with profane bloom. I keep losing war hoards that i'm cracking in front of me to the bug and they just vanish as the legion goes live.

Same to me. Posion Spark Occu + Profane Bloom

Happens with Haemophilia and CF KB. Very noticeable.

Happens with poison scourge arrow using asenath’s gloves

Happens with RF + asenaths chant for explosions and fire trap build