your Surface Pro 12 (2025, Snapdragon X Plus) is a Copilot+ PC with Windows Studio Effects — an OS-level, NPU-accelerated camera pipeline that applies its own background blur/effects before the video feed even reaches the browser. When Google Meet's own browser-based background blur tries to run a second AI segmentation pass on top of that already-processed feed, you get exactly your symptom: double AI processing on the camera stream, video stalls under load, audio (a separate pipeline) keeps going, and toggling the camera briefly resets the pipeline before it clogs again.
Zoom's native desktop app handles its virtual background differently (its own capture pipeline, less reliant on browser WebGL/WASM), which is why it doesn't show the same conflict.
My suggestion-Turn off Windows Studio Effects for the camera
Settings > Bluetooth & devices > Cameras > Front Camera. Turn off Background effects (and Eye contact/Auto framing if on) here. Let Google Meet's own blur/background do the work instead of double-processing the same frame twice.
Update Surface drivers and firmware
Open Windows Update > Advanced options > Optional updates, and separately check the Surface app for firmware. Snapdragon X camera/NPU driver stacks have had several fixes through 2026 specifically around Studio Effects conflicts with third-party apps.