Why is BBC Streaming Fine but Other Websites Won’t Load?

I've got an Asus gaming laptop running Windows 11 and using Chrome on T-Mobile's 5G WiFi. For the past week, I've been experiencing some weird issues with my WiFi connection. T-Mobile mentioned there's a problem with a local tower, and I've been getting huge lags, timeouts, and even total outages lasting from minutes to an hour. It seemed like the issue was with T-Mobile. However, while I was streaming BBC Live today, I opened a second tab and got a DNS error. All the other websites I tried wouldn't load, making it seem like I had no internet, but the BBC stream kept going strong for 15 minutes without a hitch. Any ideas on what's going on? I love T-Mobile's speed over Verizon, but I'm struggling with reliability sometimes, particularly with high ping times and jitter.