Taking millions of damage through Soul Link? Bug? Working as intended? How?

This must be a bug, but I’m asking if anyone is also seeing this.

I got wiped out multiple times instantly and the combat log shows me taking several hits of 1M+ damage through soul link. This happened in T7 T8 delves, playing with a friend.

I can’t understand how is this possible or what I can do to prevent this. This didn’t hapen in bosses, but during trash, including sporobit explosions on my minion - which it shouldn’t.