Since installing 14.4 my game apps have not been working well. I believe it has something to do with packet loss.
I test my iPhone XR side by side with my laptop. Both using my home WiFi internet.
Testing from my laptop, I experienced 0% packet loss.
Testing from my iPhone using the same home WiFi, I experience up to 16% packet loss.
Testing again from my iPhone, I disconnect my home WiFi, and use my Verizon data, I experience 0% packet loss.
I've never tested packet loss prior to my IOS 14.4 update. Never felt the need to. But since installing 14.4, I've definitely noticed a degradation when connected to a WiFi network. Something isn't right.