Internet dies at around 12:15AM every night while im Livestreaming, killing the livestream.

Been experiencing this for many months. Internet dies somewhere around 12-12:30 AM every day while I do livestreams. It blips for just a bit, but its enough time for the stream to go down. I assume its the Dynamic IP/DHCP resetting but I have tried to get in contact with Xfinity to try to alter the time and/or push it forward, and they all lead me back to "resetting the modem." I've had some tell me they have pushed the time forward... for it to then happen the next day. I'm pretty desperate, any help is very much appreciated. Thank you.