After replacing the H3, the issue appears to be gone. I can no longer make it happen by going into standby and coming out of it. It was also working fine this morning after it did the nightly reset and went into standby on its own. Time will tell, of course, but right now, it looks good. The only issue that I had during the swap was that although I backed up timers and settings, and although during the setup process, it said it was restoring them, they were not restored. Also tried restoring them manually from the Tools menu, and still no luck. Luckily, I did make note of the timers that I had, although I won't be able to get back the ones for programs that are not currently airing. I might try doing a backup and restore again before I pack the old H3 up and send it back.