Today I did a Void Crusade mission, and I got a notification on the Tarot screen that there will be a servoskull. Thus, I was paying close attention to that. However, the in-game notification of the servuskull was overwritten by an other notification (info fragment), so I missed it; then, like 5 secs later, I got a notice that the servoskull escaped.
I think the nitification should be more apparent (like a message in the center of the screen when it gets away), and add more time to defeat the servoskull, 5 secs are barely enough to look around you and find it, especially with a slower character build.