On Quest Browser with OS version v2.1.1034, WebXR controller haptic feedback is malfunctioning. Specifically, when the right controller is signaled to vibrate, the left controller vibrates instead, and when the left controller is signaled to vibrate, no vibration occurs on either controller. This issue is browser-specific, as the same WebXR applications work correctly in the Wolvic browser. The problem affects multiple WebXR frameworks, such as A-Frame, and various third-party WebXR games. The controllers vibrate correctly within the Meta Horizon OS menus, and unpairing/re-pairing and battery cycles did not resolve the issue.