Have to restart modem several times a day

For the last couple of days, our wifi connection has been up and down. It will be fine for 30 to 60 minutes and the the Internet speed slows to a crawl and then it becomes unusable and we lose connectivity to the Internet.

Restarting the modem through the Xfinity Status app always fixes this. However, with two of us working from home, this has been really incovenient and interfering with our productivity.

Anyone have ideas? I contacted customer support but they said everything was fine on their end. They did restart our modem and things were of course fine for awhile after that, but we started having problems again soon after.

Do we possibly need a new modem?