that's a bit weird as we haven't had any report about this.
You need to describe (with details):
-the exact routing between I/Os and DSPs
-the used presets (names & numbers)
as a workaround you can't boost the H8000 levels. If you are working in digital domain and levels are already at 0.0dB…there's nothing you can boost above that. Try boosting Returns in Logic.