Regarding the specific update, developer notes from that period generally focused on:
You must find "clues between the lines" in dialogues, record them, and then combine them to solve complex puzzles and advance the plot . File: Tales.of.the.Mirror.v2021.09.25.zip ...
Optimizing walking speed, adding more initial archive slots for saving, and improving "fault tolerance" for searching clues . Tales of the Mirror guide - Steam Community Regarding the specific update, developer notes from that
Increasing the number of clues players can record (up to 15) and adding an option to filter for only "useable clues" to prevent the interface from becoming cluttered . Regarding the specific update