Can you guys also not hear anything when there’s background noise?

I've never been diagnosed with anything but I had an interesting / uncomfortable experience the other day, went to a cafe with family, we were sat close to another table of 6, everyone was really loud and I felt totally overwhelmed, I noticed everyone on our table looking at me after a couple of seconds and I suddenly noticed the waitress had been speaking to me! Didn't hear a word she said until I focused on her. Its the first time I've experienced my brain just melting all the noise together.

I’ve been accused of ignoring people quite frequently. I didn’t even know this was a thing. It’s always in a chaotic situation where my attention was elsewhere but people would be talking to me and I had no idea and I got accused of just being rude. I would never ever do that. I need to go look this up.

So embarrassing to stand in front of a door, ready to knock, but you can't because someone's making noise in the hallway and you won't hear the "come in" through the door now.

Wait wait wait one goddammed second. Is that a thing: hearing someone speak, saying "what was that?", then a moment after they start speaking, you suddenly know what they said the first time?

I discovered I had ADHD in my 30s and it was life changing. If this is another thing, then I'm in for another life changing discovery in my 40s.