Developer GSC Game World posted a message to the game’s Steam page explaining that the first update will arrive “during the week to come” on both PC and Xbox.
www.videogameschronicle.com
These include “issues and memory allocation failures, which previously caused the game to exit unexpectedly”, as well as fixes to “several bugs blocking the main quest progression, NPCs getting stuck in objects, incorrect quest markers, and issues with quest cutscenes”.

Stalker 2 is getting its first post-release patch ‘during the week to come’ | VGC
The first update will fix numerous crashes and progression-blocking bugs…
