Keep disconnecting from browser games

All my devices keep disconnecting from web browser games randomly. My internet doesn't actually die or disconnect. It just has some problem with the browser game websites. (ex. Gartic Phone, Jstris, JKLM.fun) Any other kind of site or app is fine. This used to never happen before. It disconnects at random times so it could be fine for either 30 seconds or 60 seconds. None of my other friends have this problem. What could be causing this and what can I do about this?