This may be related to you issue, or not: I was having the same problem for a few days quite a while ago and discovered that my brakes were rubbing / slightly engaging even without my feet on the rudder pedals. I have MFG Crosswinds and checked my calibration and found that I had the wrong checkboxes checked for my brake axis’. Changed them and setup auto calibration and no more brake issues. Like I said this may not be your issue, but it may worthwhile to check this.