Husband leaves the house without saying a word...

So recently my husband has made a habit out of leaving the house without saying goodbye. It’s weird as hell. He has no real reason as to why he does it and it irks the hell out of me. I don’t keep tabs on him. But when you leave the house I at least expect a goodbye, kiss or a see you later. We had heart to heart about this and he continues to do it. Wtf. I’m so annoyed.