@Black-Square You were correct (as is tradition). I keep a copy of all my flight sim installers in the cloud for system restoration purposes, and I hadn't updated the Bonanza from the release version. I removed 1.1 and installed 1.0 and saw the same behavior. Memory is a tricky thing, huh?
The manually specifically calls out the two-step disengage, similar to your other aircraft. Is the Bonanza working as expected?
EDIT: I had forgotten I wanted to do more testing when I wrote this. With the Piston Duke v1.2, the disconnect works in the specified two steps. The Baron functions the same as the Bonanza. I didn't think to test the TBM because I forgot I had it at the time (I searched my installed programs for "Black Square," and the TBM shows up as "BlackSquare" )