and you allude that the patch does raise the volume correctly to start with, and the jump is an additional volume change.... let me go read the patch.

Yup. About a second after the "non-volboost-compatible" raising of the volume to the correct "previous" volume, there's a "volboost-compatible" one that comes through from *somewhere* which raises it to 85. Really strange. I couldn't find anything that was explicitly setting it like that, maybe your luck will be better.