The video monitoring broke after applying Firmware Upgrade 4.10.1.27

I had very smooth and reliable live monitoring before applying the upgrade. Now the video is choppy, it pauses for several seconds then jumps back to real-rime for a second or two and freezes again…repeat. Motion recording is not affected. I reverted and restarted the camera one and then two release levels and it still happens. WI-FI signal strength is 98%.