Definately a weird one, but we'll get it figured out.
If you physically turn the sub on, with no info being sent to it, (say TV off) and then turn on one of these heavy bass scenes, does it work properly? If so, it's clearly an issue with it being triggered out of sleep mode which could be be either the sub (likely), the receiver (doubtful), or just a receiver setting.
I have not tried it in exactly that manner. I will be checking after making one of these changes - pretty much everytime I have the system on. It will work as it should for weeks and I quit checking. Then I will be watching a DVD and notice that the bass is not there......
