Did a bit of testing with 1.0.6. I've been having the same problem as some where my left and right brakes won't disengage when I have them assigned to my toe brake axis on my pedals.
Preface - My pedals are a bit of a jury rig. Uncalibrated, I cannot get full deflection on either toe brake axis (maybe about 70%ish). Usually this is not a problem and once calibrated in XP11, they'll show up in the joystick config page as going from 0-100%. I also need to reverse the axis for normal usage. There's no noise at all or problems otherwise.
I tested using the data output for Gear & brakes (index 14).
On the default XP11 C172, I get lbrak and rbrak values of 0.0000-1.0000 without issue.
With the TBM900 1.0.6, chocks out, I get:
Pedals released: lbrak: 0.2913; rbrak 0.2190
Pedals depressed: lbrak: 1.0000; rbrak 1.0000
Here's what I find interesting - If I untick reverse axis on my left and right toe brake in the joystick config page, here are the values that I get:
Pedals released: lbrak: 0.2118; rbrak: 0.3082
Pedals depressed: lbrak: 0.0000; rbrak: 0.0000.
I'm wondering if there's something strange going on between x-plane's calibration and what the TBM is picking up for inputs. My rudder/toe brake setup is definitely a satellite case, so I can completely understand how this would likely not be noticed in any kind of testing.
Hope the data helps with troubleshooting and thanks for all the incredible support for the module to date. I'm blown away by the quality of what you folks have produced here.