No longer getting IPv6 address after Xfinity work in my neighborhood

I had a well working setup with IPv4 and IPv6. But there was some big work in my neighborhood today (got email about service interruption and saw several crews working on the street), and now that the work is completed, I now longer get an IPv6 address assigned. I didn't change any config on my side, and of course tried rebooting modem and router, still no IPv6.

Thanks,