Covid eps are a trainwreck, but...
Because of the pandemic, they're trying to piece together the final stages of this season the best they can. Cutting all these different feeds together into one seamless broadcast. No way this was all shot live. Obviously the performances weren't, but I'm not sure any of it was. It's impressive, honestly. But it's still horrible.
That said, the editing is just superb. All the individual camera shots assembled together on screen like in a 60s film or an ep of 24 is really damn cool. To see the performance and the response from the mentors all at once is great. When this show finally gets back to normal, I hope the continue to utilize this effect.