Hi, dfkimbro. Yes, it's thick. It's rolled, too, but not bent. So it's probably 24AWG.
Hi, bakerja. I remember monoprice's support said a similar thing about losing signal during handshake. So just in case I mis-composed my question, I meant that the problem happened after switching. After switching to the Mac Mini, for example, I would watch Netflix (or simply surf the Web) and during that time, the screen would occasionally blank out and lose HDMI signal in the middle of the movie (as opposed to at the start) for two or maybe three seconds. It was random. But it always happened whenever I heard our house's boiler click to life to maintain house temperature. So now I suspect our boiler is generating electronic noise that a too-long (and non-24AWG) cable would pick up.
When switching between the two -- my Mac Mini and my Windows PC -- I understand the screen will blank out as it re-establishes connection.