Chaostrail - INVISIBLE doom rings

Hello players,
I have often noticed that some doomrings are invisible.

Now I had made a video proof by chance.
The quality leaves a lot to be desired, but you can see what you need to see.
When the second doomring appears, I stop for a while because I was sure that the first doomring was still there. But, as is so often the case, I couldn't see the first doomring. So the doomring hit me. I survived, but my mercenary is usually not so lucky and is killed by the invisible doomring.
Would be great if a fix would come soon.

https://www.youtube.com/watch?v=jNFuQgr0jJ8

Regards