This is a workaround concerning the Black Stalker/**** the Drifter.
If you take the quest from Zaharich to meet the Black Stalker and leave Darkscape before you do so, the quest will bug. What happens is, when you decide to do the quest after all goes as it should until **** reaches the anomaly hearth where he just gets pulled in by one of the anomalies and disappears, leaving you stuck. What worked for me is disabling local anomalies using a spawner for OGSR (link below, or just google "OGSR спавнер"). Don't worry, anomalies get re-enabled as soon as you change levels or simply reload a save. Quest proceeds normally after.
The spawner is in Russian but the download page has instructions on how to use it. The setting you're looking for here is this: Imgur.com
NamelessWanderer
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