T17 Modifier unstable tentacles expanding during Pause

I encountered this Bug in an Alleyways Map with my Spectre Necromancer Build.

The Map was part of a memory strand and had the "unstable tentacle" T17 Modifier.

Here is a Youtube Video showcasing this. Pause starts at 36s.

https://youtu.be/tiuQ2fcaiU8?t=35

I paused the game to check something on my other screen and the effect kept expanding during the pause. When i resumed the game I immediatly got hit by it.
Very bad for Hardcore Characters.

Cheers,
Twinsen