I purchased my Roku Ultra Jan. of 2022.
This Roku has Wifi and a RJ45, so I had a choice as for internet delivery.
The 1st year and a half THIS was a great product.
Fast forward, 6 months ago, my Roku started its buffering, very bad, and randomly.
Sometimes so bad , it is unwatchable. For many months, I researched/ try to fix THIS problem here and other forums. With no solution, but many excuses from Roku.
My internet has great speeds. It come into my Modem/Router combo, 1 cable goes computer, other goes to my Roku. I installed a Ping Plotter on both, and Got VERY different readings.
I changed my setup from Hardwired to Wifi and this got worst.
I have tested my small network many times. THIS IS A ROKU PROBLEM.
ROKU, STOP lying to people and fix YOUR problem!
Stop making excuses and fix your problem!