Is The Dreadful Minecraft Warden Supposed To Do This?

So while I was testing out ways to hide from the Warden in Minecraft 1.19 so I could mine all the good stuff and avoid him when he comes sniffing around. I was under the impression that he would go away if you were behind a block (wall) and just sat still after a while. Well, this video shows otherwise.
Is this a bug?

Tell me this is a bug and they’re going to fix it. please? This guy is brutal!

Post your comments below to help me out.