I'd say that's a feature, not a big.
My guess is it protects you from future unfortunate bursts of noise.
That's why I purchased a Denon AVR-2312CI. One way to get around this is, to connect directly to TV and use the optical inputs for sound. Unfortunately, you will have to reset it after you're done.
Here is the firmware for 1.5, try at your own risk, http://www.peparsplace.com/storage/885/DTC9_8MainFW_v1_05.zip
The above was posted on this thread, http://www.avsforum.com/t/1016297/the-onkyo-integra-direct-firmware-updates/4110#post_22467762