After updating to Quest OS 2.4, the use of OVROverlayCanvas causes black screen flickering and framerate drops. The flickering is only visible on the headset and not in casts or video recordings. The issue is confirmed to be related to OVROverlayCanvas usage, as builds without it do not exhibit the problem. The flickering worsens when the Oculus system menu is opened, suggesting the issue intensifies with additional overlay layers. This regression was introduced with OS version 2.4.