Twitch chat might not load if you have a poor Internet connection or if there is some network glitch. As for the former, you can ask your ISP to get rid of the issue, but if you are facing network glitches, try running the troubleshooter, and follow the suggestion to fix the network....
Any electronic device that runs into a software issue can be fixed sometimes with a simple restart. And the Steam Deck is no exception. So the first thing you need to try to fix the connectivity issue is a simple restart. There are two ways to do this. Firstly, you can hold the power...