No change after disconnecting adapter for 30 minutes. Software seems to hang about 1 out of 20 OTA channels selected. Never returns from hang until some action is taken such as a channel down then up. Signal strength is always between 95 and 100.
After physically disconnecting the hopper, still getting hangs but they seem to be less and go in waves. When the hopper is first started up, hangs are about 1/20 but after it is up for a while, it sometimes goes to 1/5 and then clears up.