AITA for leaving to get my pizza?

AITA for leaving to get my pizza after saying "brb"? So this happened earlier tonight

and I'm genuinely confused if I did something wrong here. I (21M) was on Discord

voice chat with my friend "Beck" (33X) just hanging out and talking. My frozen pizza

timer was finished, so I said "brb, pizza's here" and went to grab it from the oven.

I was gone for maybe 10 minutes or so. When I got back to my desk, Beck had already

left the call. I messaged him "NOOOO" and he responded with "wuh, you left" and "i

was sayin ur name and u weren't there or nuffin." I was really confused and asked what he

meant, since I had said brb. I explained that I literally said