LG TV buffering on Hulu TV

I have a LG TV that is 4-6 years old. It works great except… on our WIFI with premium steaming, TV channels on Hulu Live TV buffer and pause constantly. It’s only on Hulu Live. I haven’t been able to find a menu to clear the cache, I’ve tried hard wiring the TV to our network, etc. Any ideas? Would getting a new TV solve it? All of our other streaming services work fine. Thanks!!!