Why does Manor Lords stutter during indoor dialogues?

Indoor scenes had frame times spiking from 16ms to 45ms. Rolling back drivers didn't help. GamePP Peripheral Driver Conflict Detector found a background service seizing GPU resources. I disabled it. After adjusting startup order to fix a crash, CapFrameX confirmed stable 15-18ms frame times. GamePP verified the fluctuations are gone. The game runs smoothly now.