iTach - Only power toggles show up

I’ve been sidetracked by a totally new issue on this: I absolutely cannot get the Sony SA-CT370 soundbar to respond to IR from the iTach. I know the iTach works perfectly because it controls everything else without a hitch. The soundbar responds perfectly to the factory remote, but that’s it.

I’ve tried the codes from GlobalCache’s awesome IR code database, I’ve tried the codes after manually learning them straight from the factory remote (the learned codes are identical to those in the GC database), but nothing works.

I’ve tried it with the “blaster” emitter, which controls everything else in the room without a hitch. It’s a very small room with low angled white ceilings to bounce the signal around, so the blaster approach should cover everything. Not this soundbar, though.

I’ve tried it with a dedicated emitter, both at distance and taped directly on top of the soundbar’s remote sensor.

Yes, I know this has nothing to do with Home Assistant, but has anyone seen anything like this? Maddening!