I have this issue only with my laptop. I paused all the devices connected to my network and unpaused them but it didn't help. I called xfinity and chated with support staff and did hard reset on my network but that didn't help. Do you have any other options or i should just call xfinity and ask for a different modem/router.
ps: i did all the suggested options that i can find on the internet but nothing seems to work.