Hello,
Thank you for the feedback and support!
When you first hear that whispering sound and get attacked, it means two things.
1. You are too slow to switch cameras, you stand still at one camera, or you switch back and forth between the same 1-2 cameras. If you stay on the same 1-2 cameras for too long (around 50-60 seconds), you get noticed by entities. For gameplay aspect, this also prevents cheating.
2. If you switch cameras regulary but again you get attacked, it means there are too many active unremoved anomalies. There are more than 3 anomalies in different cameras but you don't see it. You need to look more carefully. In easy and normal mode you hear whispering sound and " Too many active anomalies" message just before the attack. But in hard mode, you don't get warned before the attack.
I hope this explanation helps.
Hakan