Do you ever create a mistake when making a logo?

I know a lot of professional graphic designers needs to know the ins-and-out of creating a logo. But do some of you make a huge mistake and only noticing it after pitching the final look to the client? I'm curious! And oh, I wrote a new blog about these mistakes here: https://logomakerr.ai/blog/mistakes-to-avoid-when-creating-lettermark-logo/