As you wrote, and has been said, your concern has nothing to do with 169time products. Its how the decks work. To prove to yourself, take off the avx-1 and just record regular OTA. You will find the same thing.
As far as dropouts, you have to remember, unless one was taping, this stuff happens all the time and you would never remember it. If you have a clean signal, and everything is stable, you wont get any problems. But if you change channels, put the menu up, get a glitch in the signal, etc, yet, like anything source I have recorded from, meaning OTA also, you will get a glitch. Digital is never going to be 100% perfect from any company. It just doesnt work that way.