Door disappearence

At the time of writing this, I had just reported another bug about 10-15 minutes ago. Neither of these I got screenshots of, but there was a zombie standing outside of my door in creative, seemingly trying to get in. After going afk for a while, I came back and I could still see its hands through the door. I opened it, curious if it would come in, and it did. I killed it after that, but when I went back to close the door, the door just wasn't there. I used the left trigger with an empty hand a few times, seeing if it was somehow just invisible, but nope. It was just gone.