Anyone else having trouble with finding synthesis targets? Lately I look around in my synthesis scanner and most of the trails leading to the target are missing. It's fine at the beginning of the mission but as time goes on they start disappearing. I look in places I remember seeing a trail before and it's gone.
The Synth Scanner has always been like that. What you need to do to fix the particle trails is swap to a gun and aim down sights, then pull out the Synth Scanner again and the trails should update.
the 'trails' only seem to work right if you follow it from the beginning or haven't strayed off its invisible path.
when i know there's a target in-mission, i just swap to the scanner. i usually melee anyway. quick melee and 'zoom' check every room. they will automatically swap. don't even need to 'look' for the trail, the marker will pop-up and voiceover will start if you 'check' close enough to their spawn point (usually same or adjacent tile)